Sexual Health :: Small Cut Near Opening Of Vagina?

A few weeks ago, I noticed I was bleeding slightly after I let my boyfriend finger me (sorry if that sounds vulgar, I just really need answers). At first, I thought it might be where he didn't actually break the entire hymen when we first had sex (note we are sexually active). I noticed the bleeding a few more times after that incident. Finally, I decided to look around my vagina while the bleeding was still occurring. I noticed what looked like a small cut near the opening of my vagina. I told my boyfriend about it and he thought maybe his fingernail caught it or there was too much friction. We decided to not do anything sexual, and we did that was about a week and a half. What's confusing to me are a few things: it doesn't bleed during sex, only after he fingers me; it doesn't do it every time he fingers me, only half of the time; it burns when I go to pee after he's done that to me; neither of us have ever had a cold sore (I asked him when I read about guys passing it from going down on their girl, although I'm not sure about the other type of herpes); I'm always wet throughout the duration of the activities.

I kept reading and the only things I got were too much friction or not enough lubricant or herpes or recurring infections. And nothing matched what I was experiencing correctly. Anyone have any ideas? Honestly it looks like a tiny cut or maybe a raw spot, I noticed it bled from two or three small areas. It resembles a paper cut or something that was rubbed too much.