So my husband and i had sex last month.. My period was 02/11/14 and the 18 and 19 had unprotected sex and came inside me then on the 20 i started cramping so that day i took plan b at night and the 24 had to take antibiotics for uti now i was suppose to get my period the 11th march.. Its been a week im late been having slight cramps for a week my niples are sensitive, feel tired and sleepy took a pregnacy test and came back negative has anyone experienced this also i have clear discharge back hurts sometimes and now i pee at least 7 times a day.. Whats going on? Ivhad taken plan b before and right after i would have symptoms like brown discharge and cramps right after but not this time cramps started after two week of taking it.