So my gf woke up with a really bad period pain (much worse than usual) so I stayed with her and tried to make her feel better. At one point she called her mother  for advice, and her mom thought she maybe got an infection from me so my gf told her I don't have any since I was a virgin until a few weeks ago.
I haven't told her since she feels really bad right now but I got really mad that she's telling her mom (which I'll meet at some point) really personal information about me without asking my permission and she wasn't even going to tell me if I hadn't asked. It's not like she just told her stuff about me for no reason so maybe I'm an asshole for getting mad about something that was important but imo she could have avoided that. AITA for getting mad about it?
