Ok i had my period 1/23/11 and it lasted for 11 days which was irregular for me.Me and my Boyfriend had unprotected sex on 2/6 nd 2/7 which where the days i was supposed 2 ovulate now im 8 days late. i had one positive hpt which i did with first morning pee nd about 4 negatives from when i did them in the evening. could i be pregnant.Ppl are sayin i should get a blood test done.