Have you missed a period? Usually your body doesn'react to a pregnancy until the egg has implanted itself in the uterus (occurs around the second week after fertilization in the fallopian tube). Even then I don't think you should feel like you're blacking out...But I can't say for sure. Fainting spells are common in pregnancies but not so early on. If you are unhealthy and an egg implanted, your body may of had a bad reaction. Pregnancy symptoms vary from person to person. I knew I was pregnant when I had to go to sleep at 7:30pm one night when I was about 2-3 weeks pregnant.

My aunt fainted during her blood draw when she was a few weeks pregnant and i've heard of people fainting while walking to places.

Thanks for the reply. Well it is not close to that time of the month yet. Otherwise I have not missed a period yet. I have totally changed my eating habits b/c i'm now working the day shift and I dont get in much food in the mornings, so maybe this is another reason, but I guess time will tell......