Cervix question

Okay so I know I ask the same questions almost around the same times every month but I'm curious as anyone else is, I know we all have different ways our bodies function as women but you never know who might be going thur something simular...but anyways so here it goes...

I'm not due for my period at least til the 15th of this month, but last night my so and I had sex, at first i jist felt really moist down here lol, but I said well I know it's good, but anyways he pulls out and I'm bleeding but not heavy just enuf to actually see it, I'm not sure what went on if he touched something or as I was reading some ppl cervix can be more sensitive during intercourse, could this be what happened to me? Well anyway woke up this morning there was nothing there but I did notice when I checked my cervix that the cm was pretty much like lotion I guess u can say...and I wanted to add my cycle comes on time every month, so I dunno why would it take course of doing this...if anyone have any type of ensite feel free to comment...and I'll also ADD NO I have no types of infections or diease, I recently went to the doc last month and everything turned out normal...