Am I a psycho girlfriend

So I’m going out with my boyfriend of 8 months and only recently I’ve been learning about his sex life history and things maybe I wish I didn’t know. Please note I was a virgin before him while he has slept with a few people and had many sexual experiences before me. There things I’m learning that he’s done with other woman are making me feel insecure about myself even tho I feel like it’s very out of line for me to even consider his life before I was apart of it.

It makes me feel uncomfortable in a way know he’s been with other woman and shared experiences with them.

Ik I shouldn’t but I can’t help it :/

Is it normal or am I out of line?