Well, I had all the symptoms of pregnancy, & i was almost a week late on my period. I took a pregnancy test & it came back negative. I went to my Ob-Gyn doctor; they did a urine test too & it came back negative. I'm still feeling pretty down; I have nausea, stomach cramps which aren't anything like period or when you have to poop cramps, they are sharper & all over my stomach. I had a four day period & I had horrible blood clots, with tissues in it. I also have been puking up a foam like substance. Today the pain has been do bad; I feel like I can't even lean up.. What could this be? Can someone help?