hello, I been having signs of pregnancy since last month. some would be that I sleep at the same time everyday for the past two weeks, weird cravings, and i see a faint and feel a a faint heartbeat in my throat. my last depo shot was August of 2013. before than i was on depo between 7 years off and on,but now i really want to be. i took several urine test but some were inconclusive and others said negative. do you think I may be pregnant?