Honestly, I thought I was dying, as in had cancer or something. A enourmous amount of pain in my abdomen.
I was always feeling sick, couldn't sleep, completely irratable, and doubled over in pain all the time. I could smell aboslutely everything and finally, after 4 doctor's visits, and having already checked for a stomach ulcer, found out I was pregnant.
I should have clued in though because everyone I knew was asking if I could be preganant but I thought that would be impossible. Looking back I laugh at it now.
As my husband and I were watching a race on tv on night, an M&M commercial came on and as the colors of chocolate smeared the tv, I told him to go get me a bag right then and there (as in the 3lb bags). He turned to me and said, "you're preganant, would you like me to pick up a pregnancy test too?"
Still in denial, four weeks later, I was pregnant! Found out on week 8! Two months!!!!
Good luck, go to your doctor.