Period woes

So this month my period started on the first, was normal as usual and lasted 6 days, nothing outta the ordinary. So a week ago I had sex with a friend I've known for a while and we noticed that there was some blood. Now I haven't had sex in a whileeee and I know it's pretty normal to have some blood when you haven't had sex in a while so I wasn't really concerned. The next day no blood or nothing, back to normal. So earlier today as I'm getting ready for work, I noticed I was bleeding. I think this time it's my period cause now I'm starting to get some cramps but this is my second period this month and I just have no clue what's going on with my body right now. 😕😕 any suggestions on what's going on?