We had sex 12/15 and I still didn't get my period yet it's like 4 days late since I was suppose to get it on the 25th so basiclly. I don't know if I'm pregant. My ex and I had sex for the first time on the 15th but he only put the tip in and left it like that so I can get use to it now it's almost the 29th and still no period. Only thing I have is acne. No other signs of my period coming. I don't know what to do...