D.K.
Your baby may have turned into a lazy sucker from when you supplemented him with a bottle. The bottle is so much easier to get milk out of that it can confuse newborns when its time to suck on you. Try to not give the bottle and see what happens. If he isn't getting enough he'll want to keep nursing, and that is what will increase you're supply. Also I heard nursing in between the hours of 1 a.m. and 4 a.m. can increase you're supply, because you're body is realeasing the most prolactin at this time. Check with a lactation consultant, you can talk to them for free if you call them. Contact you're hospital Labor and Delivery floor to get the lactation consultants phone number. Good luck.