I had bad cramping when I miscarried, but they found a cyst
on my
left ovary which is why I had more
pain on that
side. I also have fibroids
on my uterus which have caused bad cramping in the past. So you may not be pregnant, but it could be a cyst. Or it could be implantation - though I don't think the cramping should be that bad. If you o'd on 8/2, implantation would just now be happening and it could be another week until you would get a definite positive.