But I often have this problem: 

I'll feel like I'm getting my period (I'll get all the symptoms...Mood swings, Bloating, pimples, cramps, the whole nine yards) but ill never ACTUALLY get it. It never comes until I have sex and then it literally starts during or directly after. Like I was on day 53 of my cycle of 19 days late with my period. Finally today I had sex and when he pulls out, the condom is all bloody and my period has started. Does anyone else have this happen to them?!? Like I can feel my period starting but it's like it gets "stuck" until I have sex.... 

Help?!?