I had unprotected sex a week before Thanksgiving (only once) my boyfriend came inside me. One day before Thanksgiving it happened again but twice this time and yes, he came again..and then on Thanksgiving I got what I think was my period but it only lasted for four days, it usually is regular. This Friday/Saturday morning we had sex six times and he came inside me all but two times. but since then, I have been having frequent urination, this morning around six I felt like I was going to be sick and since around 12p.m. I have been dizzy. I'm sorry if this is just a stupid question, but could I be pregnant? or is it all in my mind or stress?