Formula help

My son is 10 weeks old. He started out on similac pro advance bc that’s what they used in the hospital. He only used it a couple of weeks and then I switched him to enfamil gentlease due to gassiness. He’s been on it ever since. His gas never completely went away. It’s gotten much worse since he was about 5 or 6 weeks old and is even worse now. We tried similac pro total comfort and it’s even worse on it and on alimentum powder. I’ve heard the alimentum ready to feed works a lot better. Idk if my son has a milk allergy or what. He poops good and he’s gaining weight perfectly. He just has issues with gas pain and reflux. Any advice? I called his pediatrician today and they suggested nutramigen but I feel like it won’t be much different from the alimentum powder. Any advice would be appreciated. It’s so miserable seeing my boy in pain all the time.