sleep and eat

Destiny

my lo was born May 31 and was 5 lbs and was in the nicu for the first 7 days of life due to temp and glucose. (just a back story) he is now 8 months old but he still won't sleep fully through the night and still have 1 bottle at 1am. he can't have oatmeal or cereal because he has a hard time digesting it and will scream for hours after having it. He eats food 2 to 3 times a day plus yogurt melts, and has 4 bottles a day. is there any tips or tricks to help me cut the night time feeding? Plus he is very clingy to me, if I'm not there he is okay but he will scream at night for me when I'm working late, and all through the night I left him sleep with a shirt that smells like me for him to actually sleep longer than 15 mins.