Success stories of baby with Hypothermia

Anyone have success stories and insight on how to keep baby warmer? My baby was emergency c-section and weighed 4lbs 13oz. She now is about 5lbs 4oz but was just in hospital for hypothermia. We are home now but her temperature is sometimes still too low. We're worried about it most times and I'm trying to be strong but I feel so bad. Any suggestions would be great if you've gone through this.