Vaginal "paper cuts"?

Hi ladies. This is my first post. I'm 20 years old, I've been sexually active for quite a while. I've always been really sensitive, not just vaginally. But my vagina is like my golden box, and when anything is wrong with it I freak. So when I lost my virginity at 14, I was with that boyfriend for 2 years. We had a crazy sex life - but there was a point in time where we couldn't have sex a lot because everytime it was a burning painful sensation. Along with burning, it was like a bruise type feeling. Long story short, it passed and haven't felt that since. A couple of months ago me and my boyfriend of 4 years now had sex (we don't have sex often, it's an on-going situation) that we are trying to work through. I'm a really sexual person. I love foreplay, role play, sex in the car, on the beach, in the dirt, shower, kitchen... Lmao, so I'm always trying to have sex. The one time we did, I had a burning sensation kind of like the one i had when I was 14. I took pictures and everything of my vagina and right along the opening of the hole are tiny cuts, like paper cuts. I googled t and it said it was fissures from lack of moisture. But even when I am wet, I get them. I had sex yesterday for the first time in like 3 weeks and I got them bad. I understand that my vagina isn't under the same psychical routine like a person who is really sexually active, but I just don't get it. When I went to the gyno he ran test for herpes and everything but everything came out great. I just wanna know if anyone is experiencing some what I am? Tiny painful paper cuts in the lower region of their vagina opening? Also the skin between my vagina hole and anus. HELP!!