OP, I don't know if this would work for you, but when I feel myself breaking down (I have GAD and severe depression disorder) I put my entire soul and focus into studying. In fact, I obsess. I didn't figure out this helping me until second semester, but because I figured it out I pulled out a 4.0. It's not going to cure you or necessarily make you happy, but, I know a big thing for me is that I can get worked up about things out of my control, and my grades are DEFINITELY something I can control. So it just manages it and takes your mind off of whatever triggered you.
Not sure if this is necessarily help, but I thought I'd share. Feel free to PM me if you want more advice or any detail on this. Definitely see a therapist though.
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