TMI-blood?

Okay so tonight my boyfriend and I were making out. We were laying down on my bed and I was staring at him and I just needed him in my mouth like right then and there so I said “come here” and put my hands on his face and we kissed gently at first and then it ended up with me straddling him and grinding on each other while we made out. Unfortunately it was cut short because he had to go home and I was left all hot and bothered and alone so naturally I wanted to finished myself off. Anyway I was thinking about him fingering me the entire time I was masturbating and it was really good probably one of the best and I came a lot. I went into my bathroom to clean up and I noticed some blood when I wiped. I’m still a couple days off from my period and I’m always on time. I’m not sure if I maybe scratched something in there ( I have kinda long nails I guess??) but I’m not sure if it’s something I should be concerned about or see a doctor. Has this happened to anyone else?