How do I help my gy 11 month old?

My son has been formula fed (Playtex drop-ins) all his life. I've always squeezed the air out and used a slow nipple. I also burp him as much as his squirming will let me. However he will not sleep through the night because he can not find a comfortable sleeping position and is SOOO farty! I've tried Mylicon, Gripe water and tummy mage but nothing seems to help. I'm at the end of my rope, please help!