Cramps.

I'm experiencing the worst abdominal stomach cramps lately, lower down in my uterus area. But it's still 8 days till af is due. I'm usually on a 28-30 day cyle and only had af 2&1/2 weeks ago. So it can't be that. (Unless she's stupidly early, just my luck lol) Just wondering if anyone has had similar things before finding out they are pregnant? Don't want to get my hopes up, but can't hurt to be optimistic? Thanks :)