I don’t know the relationship you have with your parents, but I would suggest you make a copy of your post to show them. I am a parent, my D is also going into 2nd semester, we’re also from SoCal. Prior to this first semester in college she has never received a B in her life. She does now, 2 of them although one was B+ (wth? Why could the prof just gave her an A?) I am still very proud of her.
Your parents must relax and not put so much pressure on you, and you need to go out and meet people. This is the time where lifetime friendships are made.
Also, there are thousands of practising doctors who did not graduate from the best medical schools, but that doesn’t disqualify them as good doctors. Relax, if being a doctor is what you want to be, you will succeed without having to kill yourself.