So I was supposed to come on my period yesterday and I didn't and I am still not on it I been cramping in my lower stomach area and I never cramp before I come on and also my lower back been killing me I been having to pee a lot and I been feeling very gassy and my boobs hurt really bad I don't know when to take a pregnancy test and I am not sure what to do does anyone have any answer what do u guys think and we also been having sex like crazy and especially on the days it says I am fertile