The sorority i'm in is making me depressed

[lo52jo]

I am a pledge in a sorority and I am so upset in it. I had my heart set on sorority XYZ round 1 of rush, met a girl who's mom happened to be in the same sorority as my mom at a different school, made it all the way to pref with them, the girl who prefed me said things like "It's up to you as to whether or not you are here tomorrow", "I fought for you to pref you cause other people wanted to", "When I met you I ran up to my best friend in the house and said 'I found your little'", "you embody everything a girl in this housse should be", pretty much promising me a bid. Bid day I get my second choice sorority and I was beyond miserable on bid day and didn't leave my bed for 48 hours I was so upset but everyone told me to stick it out and that I would soon begin to love the house I am in currently and would forget about house XYZ. I've been a pledge for a month now and I am so upset still and unhappy. It's not even the pledging activities we have to do, I don't mind them and some if it sucks but it doesn't really bother me. I went home for a weekend because I wanted to see my therapist. I was set on dropping because my therapist said it was the best option for my mental health and I was going to rush again as a sophmore spring semester, but was pretty much told by multiple people (in and not in greek life) that if I drop I will most likely be blackisted by majority of the other sororities on campus because I waited too long to drop and it will look bad. I have wanted to be in a sorority since I was 12 so the idea of going through college not being in one scares me. I have been miserable ever since I got my bid from my second choice. I even think I'd be happier in my third choice and wish I put that second. I don't know what to do and my mom, friends, family, etc. have noticed a drastic change in my personality ever since I started pledging. I really do not know what to do.