Help please

Sa
Hi Everyone, I am having the hardest time with my 29 week old waking up alot through the night. He gets 6oz oatmeal an hour before bath bottle and bed. He goes to sleep around 7 or 8. He ends up waking up at 2am, then 4 or 5am and 7am. Throughout the day he has 3 or 4, 30 minute naps. Can anyone give me any advice so I can get some sleep?