Okay so im taking Microgestin Fe 1/20 and i have never missed a pill i take them on time correctly and im om my 2nd week of the 3rd month. Well my fiance and i had unprotected (even though the pills protect me) sex once during the inactive pills and then it was about a week in a half that we had sex again and later last night i went to the rest room and there was blood? And today im having minor cramps and just light light light blood and mucus. What is this and should i be worried??