Hi my partner and I perform in oral sex but always do me first and then him. I always have underwear on or pants. I'm just worried because my period is late 7 days and it never was this late before. Last month it was late 4 days. About a little more than a week ago I had a mild cold. I can't think of anything that would delay my period this much. It worries me bc it seems like it could be missed and I keep worrying myself into thinking if I'm pregnant.