I  was supposed to get my shot Oct 21 but I didn't and last week Wednesday November 11 I went to the doctor because I had heavy bleeding I did had unprotected and all this week. They took a pregnancy test it was negative but I have to go back the 24 for another pregnancy test before I go back to my shot is it possible for me to be pregnant I been feeling blotted nausea like in the morning midday and now like I want to throw up but I'm holding myself I feel a sensation like if my period is coming but no show up ?? Any advice before I go back to the doctor and by the way major headache and breast are swollen