Could also be implantation bleeding. A lot of these girls talk about it. I never had it, but I did however have a full blown cramping period with one of my pregnancy's. Dont worry about brown blood, or a light spotting of red. Only worry if.... Severe pains and flow of heavy, heavy bright red blood. Then go to dr asap.

Yes cramping in early pregnancy is very common. Your ovaries are working overtime, and it is painful to us when they do. Your uterus is stretching and also the ligaments that hold it are stretching.

Sounds like implantation bleeding, go and get a hpt or see a doctor. Good luck :)