fingering

so i ended my period yesterday, or so i thought and my partner fingered me and it felt so good don’t get me wrong but there was a bit of a discomfort, like a stinging sensation, but at the same time i loved it. is it some kind of std? or some type of kink because i found that him going aggressive turned me on? anyways, back to the topic while he was fingering he had stopped and noticed that a lot of blood was coming out, i mean it got everywhere. the blood was bright red, stretchy, thick, and stringy,, like a blood clot! so my question is, did he tear/ cut my vagina or was it a hidden blood clot ? because i did end my period yesterday. i had immediately went to the bathroom to clean myself up and when i wiped with a wipey there was no blood!? i also went pee after and it stung, it was difficult to pee but after i peed i felt relaxed? is this an std? and i currently still feel a slight stunning sensation