College is hard. I went to "the Ivy League of the South" which (without scholarship) would have been 50,000 bones a year.
I did an intensive 5 year masters program at 18-23 credit hours per semester. I would end up not sleeping, not eating, and not exercising in order to get my work done, pulling many 20-22 hour days, then on the weekends, instead of paying off my sleep debt and getting caught up, I would just party.
I would see a psychiatrist at the Student Health Center, let him know what you are going through, DO NOT tell him you have been taking any prescription meds (unless you were prescribed them), and he/she should work with you to ease your anxiety.
The first reaction will be to put you on anti-depressants because they can be effective anxiolitics as well, but they totally killed both my academic and sex drive.
Benzos are a short term solution, but once you are in, it is hard to get off them until you are out of school.
Express an interest in Bio-Feedback which IS NOT talk therapy, it is a controlled meditation where you are hooked to a computer that monitors your heart rate, temperature, and galvanic skin response, which are measures of anxiety/ panic. You can then work through thoughts, feelings, and images in your own head which may or may not help you with your anxiety. After the session, you can look at how your body responded, coordinate that with what you were meditating on/ thinking about, and then go from there. I found this to be responsible for 70-80% of my anxiety reduction with valium filling in the other bits when needed.
Benzos, though easy to take, should be a last resort.
And having a relationship with a psychiatrist at your schools SHC will be good for at least 2 medical withdrawals over the course of 4 years (I luckily never had to use one), and you can always pull a prof aside in a class you are struggling in and explain that you are having mental health issues/ just switched medication and would gladly furnish a doctor's note, but 90% of the time they will be too embarrassed/ flattered you would confide in them/ or just plain busy that they will take your word for it.
DO NOT TAKE TIME OFF. Stay the course, and even if you get a 3.0 or 3.2 you can still graduate cum laude in the end.
PM me if you would like to talk at all about this, not to belittle any other course of study, but Architecture students have it very tough with late studio hours/ no sleep/ and a culture where even professors and practitioners use adderall and xanax to get up and go to sleep nearly every day, this can become a bad cycle, and while in school, I saw it in almost every course of study, but it was most pronounced in mine.
Good luck, and like I said, feel free to PM me anytime.