Could this be discharge or semen ?

i had unprotected sex yesterday & I just wiped my self after using the bathroom & I had to wipe 2-3 times & the second time this came out, I’ve had unprotected sex before with my bf while on birth control & I know the next day some of his semen comes out of me but yesterday i wasn’t on birth control & I told him not to cum in me & I think he didn’t it was on him when he came , I was riding him & I got up & it was on him I cleaned my self bc it was on my thigh , idk if this is his semen or discharge but it was a lot