J.S.
My son slept in his car seat until he was almost 7 months. We buckled him in after he fell asleep. He also had reflux. We started him on Carnation Good Start - and the reflux started to go away. We would let him sleep in his car seat, and put the car seat in his crib so he got used to being in there. After about a week, we just put him right in the crib - no car seat - no problem! Good luck!