Copyright 2018 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed. Carla Stephaniak was reported missing. Family photos 
 
 RIVERVIEW, Fla. (WFLA) - A Riverview family is desperate to find a loved one who vanished during a birthday trip to Costa Rica. 
 
 Carla Stefaniak, 36, was supposed to fly home from her trip to Costa Rica on her birthday, Nov. 28, but she never made it. 
 
 Stefaniak and her sister-in-law April Antonieta, of Riverview, had flown to Costa Rica to celebrate Stefaniak’s birthday. They visited a lot of places in Costa Rica and had a great time. 
 
 Antonieta had to fly home one day earlier than Stefaniak on Nov. 27. 
 
 Antonieta told WFLA.com that Stefaniak drove her to the airport and dropped her off. Stefaniak then returned their rental car. An Uber driver picked up Stefaniak and took her to the Airbnb she was staying at. 
 
 Antonieta said she and Stefaniak continued to communicate with each other while Antonieta waited for her flight at the airport. 
 
 The Uber driver took Stefaniak to her Airbnb and offered to give her a 1-hour tour of San Jose. She accepted and went on the tour about an hour later. 
 
 Stefaniak continued to communicate with Antonieta during this time. 
 
 Stefaniak returned from the tour and was dropped off at her Airbnb. She communicated with Antonieta and said it was raining really hard and the power had gone out. That was the last time Antonieta heard from her sister-in-law. 
 
 Stefaniak was supposed to get on a plane to fly home to Miami at 1 p.m. the next day, Nov. 28. 
 
 But, that never happened. 
 
 Antonieta said she initially wasn't worried when she did not hear from Stefaniak that morning, she thought her sister-in-law may have slept in. 
 
 But that wasn’t the case. 
 
 "She totally went missing, ghosted on her birthday, which is totally unlike her," said Antonieta adding that Stefaniak’s social media accounts have gone silent, which is very unusual. 
 
 Antonieta said she has contacted the Miami FBI, the US Embassy and Senator Marco Rubio’s office about Stefaniak’s disappearance. 
 
 Antonieta has also created a flyer that is being shared on social media with the hashtag #FindingCarla. A GoFundMe page has been created to help pay for a trip to Costa Rica to search for Stefaniak . 
 
 Antonieta said her husband and a friend flew to Costa Rica this morning to search for Stefaniak. 
 
 She did not go. 
 
 “I’m scared of what I’m going to find,” she said. 
 
 Antonieta said her sister-in-law lived in Tampa for 12 years. 
 
 Antonieta and her husband live with Stefaniak’s father in Riverview. 
 
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 MIAMI (CBSMiami) – Relatives are searching for Hallandale Beach Resident Carla Stefaniak, who disappeared in Costa Rica. 
 
 CBS 4 was given several cell phone clips from the trip she took with her sister-in-law, April Burton. In all of them, Stefaniak was smiling and cheerful while on vacation for her birthday. 
 
 However, she never boarded her Wednesday afternoon flight to return home to South Florida. 
 
 Burton spoke to CBS 4 from Tampa. 
 
 “Hopefully, we will get a tip that someone saw something; anything,” Burton said. 
 
 Burton left a day ahead of Stefaniak’s scheduled departure for a prior commitment. 
 
 Burton told us her sister-in-law then went shopping and exploring the area in an Uber. 
 
 The last time she heard from Stefaniak was 8 p.m. that night. In a news release, from a public relations agency, Relatives stated her last text messages were about the power going in and out. 
 
 “We just want to know where she is. We just want to find out where she was,” Burton said. 
 
 Stefaniak’s brother is now on the ground in Costa Rica searching for his sister. 
 
 “My husband, her brother is there. He said he’s not coming back until he finds her,” Burton said. 
 
 Relatives have spoken to the owners of an Airbnb, an Uber driver, and security guards. They all told relatives Stefaniak left early Wednesday morning around 5 a.m. and got inside an unknown car. 
 
 “She was just such a happy go lucky person. I’m just afraid she was just too trusting with someone there,” Burton said. 
 
 Since it has been more than 48 hours, Burton is finding it tougher making it through each day. 
 
 “Sometimes I’m more upset than others. Sometimes I can control it. I’m trying to focus on the positives,” Burton said. 
 
 Relatives have started a GoFundMe account to support relatives who are in Costa Rica searching for Stefaniak. 
 
 Family members are also calling on lawmakers to assist in the search efforts by talking to leaders in Costa Rica.
– A Florida woman has gone missing in Costa Rica after visiting for her birthday and getting into an unknown car, WFLA reports. Carla Stefaniak, 36, was scheduled to return Wednesday, the day after her fellow traveler/sister-in-law flew back—but Stefaniak never made the plane. "She totally went missing, ghosted on her birthday, which is totally unlike her," says sister-in-law Antonieta, whose last name is reported variously in the media. "I'm scared of what I'm going to find." Now Antonieta's husband, who is Stefaniak's brother, has flown down with a friend to find her. They've talked to security guards, an Uber driver, and Airbnb owners, who say Stefaniak got into an unknown car Wednesday morning, per CBS Miami. According to relatives, Stefaniak dropped off her sister-in-law at the airport Tuesday, returned their rental car, and took an hourlong tour on San Jose in an Uber. That night she texted that rain was pouring and power was intermittent. Her last text: "It's pretty sketchy here," per QCostaRica. Police investigators confirm she left her room with her luggage at about 5am Wednesday morning. Her social media accounts have gone quiet, with her last Instagram post showing her on vacation Monday. Antonieta says she's told the Miami FBI, the US embassy, and Sen. Marco Rubio's office, and set up a GoFundMe page to pay for the search. "She was just such a happy go lucky person," says Antonieta. "I'm just afraid she was just too trusting with someone there."