Help I’m confused

Emma

Okay so After me and my man did the deed. I went to the bathroom nothings wrong. But I went like an hour or two later and noticed while whipping bright red blood. I told my man to tmi sorry to stick his finger in so he can see it for himself(we are super close and okay with that stuff). And he seen it after whipping it on tissue. Any idea what it Could be. I have no stds I’ve been with him since I was 15 no problems.