I think I'm pregnant but tests results are negative. Need answers?
I am 20 years old and I think I'm pregnant. The last time I got my period was feb 03, 07 and it lasts about 7 days and I had sex with my boyfriend while on my period and the condom slipped off and stayed inside me. Two weeks later I started feeling all the pregnancy symptoms and by the next month My period was about 3 weeks late. I started bleeding on march 23, 07 like a normal period but I only bled for 2 days. And I haven't got my period since then. I had taken 2 pregnancy tests and the last one 4 days ago but they still come out negative. But I think I might still be pregnant because I continue to have all the symptoms. And I'm gaining a lot of weight around my waist and belly. None of my jeans fit anymore and my boobs hurt like hell and I have cramping in my abdomen. My teeth hurt real bad and I can't sleep well anymore. And my period still won't come and my period is usually very regular its every 28 days its now April 13th and nothing... I have been pregnant before but I got an abortion so I know what pregnant feels like and I feel the same way like I did the last time only this time a little more different. Could I be pregnant?? If so, why are the tests negative?? Need advice...