So she basically tells you that you are a slut, a disgrace, and that you should stay home (so she can make sure you remain pure until marriage i guess).

Ask her how exactly did she raised you, like, to be a woman, or to be a housewife ? Ask her why she told you that you are a slut, is it because you brought the guy into her home or is it because of the sex ? If because you took him home, then tell her that this way you wouldn't feel forced to do anything against your will. If because of the sex then she is a boomer.

You should move out as soon as possible. She seems to have a toxic mentality. You'll probably have to take a loan, especially if you are a student.