It will be all right. I have been in a similar and made it out fine. Take a deep breath, step back and try to look at the big picture.

1. What are the immediate problems? How big are they really (what is the worst that could feasibly happen, is it really as bad as you think it is, vocalize them)? Filter out the things that aren’t actually a big deal, prioritize the rest and work on them one at a time. No more, no less.

2. Make it a priority to get yourself a diagnosis and a treatment plan. If your current psychiatrist won’t help you, look for another one.

3. Don’t worry about the big picture stuff right now. You’re not in the right headspace to make any big decisions. If you can put your studies on pause I would advice you to do so until things have calmed down. Make sure you have something going on though that keeps you active and occupied without being stressful or taking over.

Not sure this is an ADHD thing but what will happen to me is I’ll be in a flow state, working on something, and feeling that my attention is about to run out while struggling to solve a particular problem. It’s incredibly stressful and annoying to know I have like 10 minutes tops or I’ll be stuck on this problem for a week (because God forbid I break it down into small enough chunks where it’ll be easy to pick back up tomorrow).