hi i hsd my period 2 weeks ago, my fiance and i had sex he came inside of me and the next day i took the morning after pill, on monday the 4th april i had bad cramps the tues when i wiped it was light pink blood so i thought it was my period again from the morning after pill, then everyday this week i have a brown discharge wheni wipe, no blood is coming out so its not a period, i get cramps now and then, what could this be?