I am a university student, doing a scientific bachelor study. I plagiarised multiple exercises from multiple homework sets for three different classes, all in all about 50% of all the homework for those three classes. I passed the final exams of those three classes. Realizing what I have done, I am considering turning myself in, unless the punishment would be too severe. What do you think?
Edit: I actually got caught once before for plagiarising on a single homework set.
Edit2: I calculated that redoing the courses would cost me at least $7000, this is also a consideration for me personally.
Edit3: I actually copied the homework of a friend who gave it to me because he trusted me. I broke this trust, and now he terminated our friendship. I asked him about it and turning myself in is the only way to earn back his respect.
I'd like to know from more people what kind of punishment I could expect. If I turn myself in, I would find it fair to only have to redo the three classes.