Random but worried

Katie
So I am 11w6d and no morning sickness, just occasional nausea throughout the day. No cramps, no vomiting; nausea is annoying but I'm glad I have it easy. All the sudden this evening I started feeling kinda weird down there, like cramps before your period. I'm worried it means something bad. I didn't drink as much water today as I should have so now I'm scared. Anyone have anything like this?