I'm 27wks tomorrow and I'm getting worried. I've been having some light cramps since I got home…

I'm 27wks tomorrow and I'm getting worried. I've been having some light cramps since I got home couple hrs ago. I tried drinking water and Arnold Palmer's didn't help much but it did a little. I took a zofran seeing if she was just cranky about something I ate. Helped a little but again only helped a little. Maybe she (my daughter) takes after her daddy and doesn't like this hot weather? I've tried all I could think of and it's not helping much. What should I do?