Me and my partner have been sexually active for the past 3 months. We have unprotected sex but when he nuts he doesn t inside of me. I am 2 weeks late from when my period was due. Lately I ve been feeling nauseated, dizzy, my nipples are very sensitive, and im always tired. I took a pregnancy test and it came back negative. Should I wait and take another one before going to see a doctor? Or is there maybe another reason why I may be feeling like this?