pregnancy

Well I went to Florida , I left July 7th for Florida and I got back yesterday. But I got off my period about 1 1/2 - 2 weeks before I went. And had sex twice with the same person two different days . We wore a condom but I'm not on birth control. Ive been tired lately and I have peed more than usual my stomach has been hurting a lot. I fart so I really don't know if it's different from normal. Could I be pregnant. Please help me.