Movements!

Kayla

I'll be 37 weeks tomorrow. Today babe hasn't been moving too much. I feel her every few hours but not as much as usual. I know there's not much room in there but she just isnt moving as much. My back is crampy and has been for days and I have some minor cramping on and off in my pelvic area. I was told on 1/4 that she was low but I was still closed off. Should I be worried?