Extra skin "down there" postpartum

OK, I don't wanna sound crazy and I hope I'm not the only one that is dealing with this, but I never knew I had this until literally tonight but I noticed that inside of my vagina, on the right side of my skin right before my opening I have like skin growing over my skin that's already there… It's not "lumpy" or anything it's looks like scar tissue maybe that grew over my skin already and I did have two kids and my first daughter I did tear. I'm not sure where though but I did have stitches. I'm not sure if it could be from that. Idk if it's normal? I've had exams within the year and my OB said everything is normal. It doesn't hurt or itch. Nothing is protruding out either. I DO remember vaguely my OB saying I tore on the outside of my vagina and needed 2-3 sitches, just don't remember where like I said it was almost four years ago. My mother says it's scar tissue but I feel so self conscious now. I had an exam in October and was told everything looks fine down there but I'm worried my OB missed it and I'm worried it's cancer or something like wtf!