Its about to be a Month on the 15th that I had Unprotected Sex, which was 2days before my period was due, and when my period came it was super light, I normally have normal flow periods about 3 to 4 days but last month it lasted about 9 days & it was just spotting really light pink. I took a pregnancy test on the 26th and it came out Negative, Now for the last two weeks I been having headaches almost every day, I been having white discharge, vomiting alot and now my lower back is hurting for no reason