Pregnancy Info HOME

My last normal period was the end of January/early February......I had unprotected s_x on Feb 17 and almost immediately was crampy....on Feb 23 I bled but it wasnt a normal period, it only lasted a day and was bright red.....to this day I am still crampy on and off and feel bloated and have wierd feelings in my abdomen....I am light headed and dizzy sometimes and have some nauseousness and lower back pain sometimes.....I have taken 2 HPT and both were negative.......HELP......what else could this be if not pregnant?