Hi, and welcome to PC, it sounds like you are just having "panic attacks" and you have not learned how to self sooth and calm down. It sounds like you are instead making them worse because they frighten you.

Please dear, don't try to diagnose yourself, that is scary. You could just be having anxiety challenges and to be honest, a lot of college students struggle with that.
The economy is tough right now so if you don't get a job, please don't stress or self blame or allow it to get you all stressed and "self defeated'.

Unfortunately, not all courses are going to be "interesting" so do your best to get through them, and you will get through them all eventually. Focus on relaxing and when you get feeling anxious make it a point to distract yourself, go for a walk or doodle for a while, even come to PC and read, try to find things though that are not stressing. Maybe check out the Games area.

Honestly you can learn to reduce the anxiety and get control over it instead of feeding into it. You are going to be ok, try to "not" project failure, keep moving forward and find a rythm that you can get used to.

(((Hugs and Relax)))
Open Eyes