Yes it is very normal I have very bad night sweats my man hates it cuz I have to keep window open all night. I usually get the chills during day and sweats at night its funny I have to sleep in almost nothing at night and im dressed like an eskimo during the day! With the heater turned on and off,on and off....
Apparently it gets better in the second trimester! Yay something to look forward to.
Hormones make my body thermostat entirely out of whack, either too hot or too cold.