Help me

last month on July 30 was my first day of ovulating, and me & my bf had unprotected sex and he finished in me. Now in August I had soar breast at first but now I just keep feeling nauseous especially after I eat but the thing is Like a week and a few days after we had sex I went to my gyno they took a test and it was negative & I started spotting a brownish/pink color from August 14-18 then 4 days later in between I was having a lot of white discharge and yesterday on the 23 I was walking and I started bleeding dark red blood and I still am...idk what’s wrong with me