Confusion is the Killer Part!!!

[BSBrown2015]

In May I found out I was pregnant two short days after I started bleeding, I went to the er they said I had and early miscarriage. I wasn't expecting a normal period so soon but it came right on time June 27th. July I had unprotected sex with my bf during O but thought I got my period, it was very light I didn't even have to wear a panty liner but thought nothing about it at the time. I am week and 4 days past my period. Now I am tasting an awful metallic taste with everything I put in my mouth, nausea, dizzy spells, blood pressure fluctuations, my breast feel tender but only at times, and I have fainted and when I do start to pass out I white out not black out if that makes sense. I have taken 3 hpt 2 neg. and 1 invalid. Could anyone please think of any solution to these issues? I was sure that I was having pregnancy symptoms but the tests say NO.