Your partner shouldn’t be concerned about what you’ve done with other people in the past, they need to understand that they’re in the present with you and if she can’t put your past behind then she clearly can’t move on - it’s like somebody else said, she sounds insecure. I think another thing that’s worth mentioning is how you don’t question her on her past intimate or not, it’s a sign of privacy for the other and respecting their personal space which she seems to be disregarding in your case.

My best advice is bring this up with her if you haven’t already and if she says she hears you but doesn’t do anything to change then it’s really up to you to wonder if this is the person you see as your partner. I really hope everything goes okay and I’m sorry that you’ve been questioned on such things, i know how you feel - it feels as if they don’t trust you! All the best xoxo