Gentlease - still gassy with reflux

We started on the yellow enfamil Neuropro ready to feed right from birth and after three weeks on it, we just noticed she was extremely gassy and seemed uncomfortable, so as of a week ago, we switched to enfamil gentleease and I haven’t seen any improvement in the gas. Does it typically take longer to see improvement? Should I stick it out?

She does have issues with silent reflux and delayed trapped burps, and regurgitating milk hours after she eats, which I know is contributing to the fussiness. Our pediatrician wants us to try a hypoallergenic formula even though she’s not showing signs of CMPA because they said that is first line treatment over reflux medication.

My son also had CMPA so they are thinking maybe she does too, but he had obvious signs like a body rash and blood in stool and constipation.

Any advice or suggestions would be appreciated!!!