Ok, I started my period on October 28th and I ended it November 3rd and that same day me and my fiance had unprotected sex, and now for two days straight I have been feeling nauseous and crampy, and tired, so i dont know if i could be pregnant or not im really scared because if i am this would be the first time I became pregnant, so anyone out there want to give me some tips or comment on this i'd really appreciate it!