Could I be pregnant? Had sex 20th and 26 of October .My period usually Comes 12th of every month, missed my period and had light spotting on the 14 of November ,red when I wipe brown on my underwear, now two weeks later ( the 29 of nov)the same thing is happening again but I had cramping two days before, my pregnancy test was negative, could it be more serious .... I don't want to be pregnant so it's not mental I've just never missed my period since I was 10, because I have terrible periods I throw up and have extreme pain