So sorry you're feeling like this w0olfqu33n. Although things feel really awful right now, I'm so glad to hear you've got some professional support. It's fantastic that you like your psych and hopefully, she'll be just one of the people in your life that can support you through this time in your life. I know it seems like a while before you can see her again (and sounds like a while too), but you only have to hold on a little longer. Hopefully, she's given you some things to try in the meantime.
Can totally relate to feeling like you can't breathe all the time. Was literally almost given an asthma puffer, before my doctor realised that I was just super stressed and anxious. It's not a nice feeling, but it is something that will eventually pass. When I was really struggling, I thought that there was no way things would ever get and better, but then I woke up one day, looked back, and realised that things were better than they had been a month ago, and a lot better than they had been the month before that. You'll start making progress, and before you know it, this will be behind you.
Although this phase is dark and gloomy, remember that the sun is just behind the horizon, and will come again. <3
And like Geo and Bri said, focus on you at the minute. (Stuff those exams; they mean literally nothing.)