Bleeding after sex

Fancy Nancy
So I just had sex and I haven't had sex for about 3-4 months and lately I've been kinda spotting because back in September I took plan b and it really screwed up my period So I've been spotting on and off since then. But when I had sex it kinda felt like the first time Like a little bit of pain. But then it turned into the good pain. But when I got up I bled all over my comforter and him and myself...is it Possible that it brought on my period? Because according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> I'm suppose to get it on 6 days but I've also been spotting for the last few days as well. And I have cramps now. Or could it just be that i haven't had sex in a while and am kinda just getting back into it and have to get use to it again...??