What should I do (details inside)

My girlfriend’s parents are over protective.I got a text this moring saying that we would not be seeing each other outside of school for a while, because we broke their rules. I don’t know what I did wrong. She is not allowed to text me after 10, and last night she sent me a text saying that she was going to bed and I sent her one right after saying goodnight. We are only 15 years old and we have been dating for almost 4 years now and this has happened a few times now, and we now both think they are trying to break us up. Should I wait to call them and ask what I did?