My 2 month old has bad gas problems that seem to start at 2 in the morning every night?

He's on similac soy he wakes up every hour from pain and cause he's hungry but he'll only eat an ounce at a time cause his stomach hurts this goes on till about 7am I've tried gas drops, gripe water,massage, I use dr. Browns bottles I don't know what else to do this has been going on for a few weeks now.