2 weeks late with period cramping since i missed my period!!!!

ok trying to figured out if im pregnant or not. My mind is telling me i am but ive had alot of false signs and ended of getting my period. Well my last period was april 27th 2011 and its june 12th 2011 and still no peroid. Im never late if anything im early. Nothing in my environment has changed so i don't know if im not pregnant why it would be late. Ive taken 5 hpt's and they are all negitive. I have a few sings of pregnancy like major tiredness and some quizeyness but not alot. I have been having cramps throughout this month and i think im gonna start and don't. My breasts feel senistive but nothing major. I pray that i am pregnant, ive made a doctor's appointment this month to see by then i will be 3 weeks late if my period doesnt come. Has anyone been through this?  :-(