Could I Be Pregnant?

My last menstral period was 03/30/14 and it was two days earlier than my tracker predicted. I had unprotected sex on the following days using the pull out method. 04/06, 04/07, 04/10, 04/11, 04/19, 04/20, 04/21, 04/22, & 04/26. According to my tracker I was supposed to ovulate sometime between 04/11/14-04/17/14 and I took a pregnancy test on the day I was supposed to get my period, 04/30/14 and it came back negative. But I'm nauseous and dizzy, my boobs hurt so badly I can hardly stand to touch them, I feel like the urge to pee never leaves me, and I get pain in my pelvis region just randomly, plus I am tired all the time even right after a long nap. Not sure if maybe something is wrong or if I could possibly be pregnant. Any advice is helpful!