J.H.
First of all, if you are doubting her movement, call your OB. It never hurts to check!! Better to be safe.
I had chills and night sweats a lot shortly after giving birth to both my daughters. It lasted for a few months. I definitely think it was a hormone thing! It's uncomfortable but not concerning I don't think. But with your history, call you dr. for some comfort.
Best of luck!