Me and my bf have been having a lot of sex than usual last month. I usually get my period around the end of the month. But last month it was odd, I got it but it was very light. I usually get a heavy flow the first two couple of days. A week later I’m now on my period again. Is that normal, did all the sex last month messed with my cycle? I’m on birth control pills to control my heavy flows, but this is the first time that has happened since I’ve been on it. Could it have been the sex?