About a month ago I wrote on this subreddit ask for advice about my mixed feelings on getting the career I worked so hard for.I finally found a new real estate brokerage that i feel very comfortable in and I like everyone in my office,so far I am getting all the help I need(My mentor is amazing so far he is helping understand the contracts) and my parents have decided to pay my fees not onlying that but I have my friend who's going to be buying a condo or a townhouse form me,1 home buyer on the way and an investor as well. Last week was my first days all I did was getting ready and helping my friend to get a second opinion on his pre-approved loan however I didn’t feel like eating any time I was at the office

I just got medicine for my stomach aches that I get every morning(I can’t go back to sleep because of this) and for nauseous as well. Now I never talk anything bad about myself but on Sunday as I was showering I got a huge negative thought about myself,that I can't do this and just now I cried because I feel like I am lost,no matter how much I try to place positive things on my mind I keep having those small negative thoughts on my mind that causes small stomach aches and the worse part is that I don't feel like eating,which kinda explain why my stomach feels that way.Also out of no where I have  feels like crying,worried, and most of the times my heart goes fast/crazy.(I don't know how to explain it)

So for now I am going to go to the office when we have meeting (2 meetings per week) and when I'm going to be bring in clients for presentations for the rest of the week I will be working at home,to be honest I have gotten use too since I been studying for real estate for 2 years at home and I felt like I was relaxed plus I literally studied nonstop form Mon-Saturday form 8-6.

What’s the best advice that someone could give to a 20 yr who just started their first career that feels lost and has a feeling that I shouldn’t be doing this?

I know that I can do this but Why am I having these thoughts out of no where?I am the only male cousin in both side of my parents family to get a official career and I don't want to fine them nor my parents