Help help help

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So, my period ended on the 18th of january and today i had sex with my boyfriend with a condom. a half an hour later i went peeing and when i cleaned myself i noticed that there was just a little bit, very very clear, of blood, the type of blood you get they days after your period ends, you know? It kinda scared me and Im looking here for just some thoughts and what might be.

Im 18 and i have had sex with him for two years if you want to leave a negative or judgmental comment please dont.