I had sex march 8th,17th,and 23rd. The last two times unprotected but my fiance did not ejaculate,but I am worried because my period came today and it was red,but my cramps were horrible and I didn't bleed as heavy as I usually do.I got my last two periods jan 30th and march 4th so I expected this period to come april 8th.would this be implantation? Please help. Would I know I'm pregnant by now or no?I'm waiting til Saturday to take a test.