Babies will prefer bed sharing to sleeping on their own - they aren't mature enough to understand why they are alone when they need Mommy.
Every 2 - 3 months the infant goes thru a growth spurt... around the 9 month mark is a very common growth spurt. He's cluster feeding, will seem unsatisfied but is truly priming your body for the next phase. THIS IS GOOD - since you need your body to produce more now for your growing infant.
Good way of moving gas- if it really is gas - is to bicycle the legs and pump the legs gently - like how you walk, bend, etc. Movement gets bm's and gas out.
Nurse often side lying and sleep when baby does. You'll get much more sleep!