baby gas pains

my baby boy is 5wks old, he has been on 4 different formulas to try and help with his gas problems. right now he's on Similac alimentum. He's been on it for 2wks. but it just seems like his gas is not getting better. He screams in pain and I already give him gas drops and gripe water. I also massage his belly, do bycicle with his legs and lay him on his belly and rub his back. is there anything else I can do for him? it makes me so sad seeing him like this. 😢😭 after he finally passes it he's a happy baby, but it takes him forever to get it out.