cali's doing something wierd.

I was wondering if she could possibly be going into labor. she looks like shes sucking in her stomach on the sides. so right at the point where her back meets her back legs she has a hollow, shes only doing it for 2 seconds then her belly goes back to normal. its also not consistant she has only done it like 4 times in the last 6 hours. I havn't seen a mucus plug and her nipples are still dry and shes still eating and drinking, just not as much she will take like two bites and then go lay back down to sleep. Can cats have braxton hicks like humans?

It could be contractions, but since there aren't many, I'm not sure...I'd just wait, and watch her closly, and look for nesting signs