me and my partner got done having sex and there was blood. I just recently got an sti test like 2 weeks ago and everything was clear and i’ve only been with him since. My period isn’t suppose to start for about 8 more days so i’m super confused.

and the blood was on his penis, and i also squirted so idk if that had anything do to with it.

the blood was on me as well not just his penis*

Are you on birth control?

yes i am

Were you prepared enough? Like did enough foreplay focused on your clit and/or used lube? If you did then it’s probably just that the motion has triggered breakthrough bleeding and is nothing to worry about. You only need to see a doctor if it happens regularly.