...on it, but i cant be pregnant..? Well on Jan 18 or 19 I did a little something with my boyfriend unprotected but he didnt cum but there was precum and it was for even shorter than a minute. I have an irregular period but it did come around the normal time. Its now Feb 7. and I feel nausea and my stomach have been upset. I just got on my period and when i was laying down I felt lower abdoman pain and when i pressed down on it i could feel it in my vangina too. This happened to me before and i wasnt sexually active. I cant be pregnant so what is it? And also Ive been having minor back aches. I am an athlete so maybe that can be a factor too.