I am 31 years old. I had unprotected sex a week after my period (which lasts 3 to 4 days). A few days after sex (july 12) I started having dizzy spells. Ill be standing there and it hits lasts a few seconds then is gone. It isnt every day. Ive been experiencing nausea, bad mood swings (my boyfriend put us back to friend status temporarily until i get back to normal.. bad) and at the very bottom of my abdomen I ve had slight/uncomfortable pains. Today it feels like full blown period pains. The.. i guess.. bones above my vagina hurt so bad. And also today i was hungry and went to get a snack. After a few bites and just sitting on my bed nausea to the point of almost gagging hits and last then leaves. Ive felt so drained. The last time we had sex was a month prior. Again unprotected. But pregnancy test come up negative. Even the one i took today. What could this mean and what do i do?