First of all, your life is not going down the drain. A semester of college that's not going as planned is something that happens. You are no worse than the multitudes who came before you with the same issues. I saw it when I went and am still seeing it today with lots of other kids. Whatever you do or don't do, the results are not so irrevocable that you can't come back and straigten it all out when things settle down a bit in the other areas of your life.

My advice for support would be to priortize yourself--that is open up with the therapist so as to make progress with the "everything" you mentioned. Once the anxiety and bp are better understood, maybe then come back and give school another try.

And....in your present state, I think I'd put the drinking on hold for the time being. If it's not helping you with your current situation, I'd leave it alone.

Lastly, don't blame yourself for what you are experiencing. You are too young to have all the answers--that's what your therapist and family are for.

Best of luck.