I had sex wit my boyfriend and he got off in me. only a couple hours later i started my period. Before this we thought i was cause i was having alot of symptoms of pregnancy. We are trying for a kid and ready to start our lives. But we took the test and it has came back neg. But I have been craving alot of foods, Gainin weight. I mean i look like i am but nothing its all negative. Does anyone know if i could be? ?