No fever. You're not over covered the baby and he requires it for weight gain and comfort to sleep properly.
He only requires to be fed for 15 to 20 minutes as against they feed for 5 minutes and sleepoff,which again causes hunger and passes urine by 1/2 hour.
Next Steps
Give one breast complete emptied and then turn to other side as this causes fore milk and hind milk to be fed which satisfy the needs of the baby.