My baby is 4 months old. He was on the bottle when we left the hospital as my milk was so slow to come in. When it came in he rejected the bottle. Now he is feeding more frequently in the night (4-5 times) as he is so hungry. I've been told he needs formula as it's heavier, but he just won't take the bottle. I've been trying for months.. Any tips. I desperatly need help. I can't go on any more!!