could it be from the pill?

I started bith control on the 14th of August (when i got my period) I took it correctly my period finished than 4 days later I got my period again it stopped after a few days than again 3 days later I got my period again (which brings me to this week) last night me and my SO had sex it wasn't rough sex but slow and passionate... after I stood up and as I did i had dark red blood run down my legs and dripping on the floor. i was mortified and ran to the shower to clean up.. I sat in the shower for a bit and checked myself over i wasn't sore I didn't tear or anything.. my cervix is hard when normally its soft and down low while im on my period... with all the bleeding i had I started to take my pill earlier each day my SO doesnt wear a condom until he gets into it, he always squeezes the left over cum out and goes for a shower and properly cleans himself up. i don't want to go to the hospital because I'll be sitting there all day with 2 young kids, doctors aren't open on sundays.... I did take a test the other day just because i seen it in the draw and I thought I seen a faint line but didn't think much of it until I seen it few hours later with 2 dark line i know that can most likely be an evap line...