Thanks everyone for the replies.
Today I had group therapy, but instead I talked to my psychologist (she's one of the 3 therapists who work in that group) and I told her that I think my last panic attacks (besides the one the day after the drinking) were about how much of a failure I felt at class, and then I told her about the suicide attempt. They said they couldn't let me go if I don't have a new diagnosis (to prove I wouldn't do it again?) and they made me call my mother (at home, dad was working) to come and take me home after it. She came half crying, she was mad at me and my sister came as well, she barely talked to me. My father doesn't know yet, he will know when he comes home, let's hope it goes well.