I live in a condo complex where I share a wall with my neighbors on both sides of my unit. One of my neighbors sent me a text this morning. She said she found my number online (first of all, weird) and that she wanted to complain about the noise I've been making. She said, "I've noticed much more Pinder traffic and loud parties on Sat nights. Place is no longer quiet". This is all completely false. I live alone, I don't have visitors (literally none), and I don't think I make an excessive amount of noise. 

I am going to try and be an adult about it and approach her in person, unlike her. I wish she would have just come to me and talked to me. Because I am such an anxiety-ridden, people-pleaser, I NEVER want to be an annoyance to anyone. I have to wait until she gets home to talk to her, though. So, i'm just sitting here, overthinking for the whole day. Things like this just take over my brain and I can't relax on my day off because of it. Anyone have suggestions on how to talk to her?

P.S. what the hell is "pinder traffic"? lol