Help please

Nicole

I breast feed my one month old mostly I give her maybe two 3 oz bottles a day of formula because she’s always hungry. Her gas has gotten worse and worse and she always seems to be in pain mid day and on. Screams non stop. Realeases some farts but usually just struggles to. I has gripe water my question is I just switched to similac pro comfort from advance last night was the first time . How long before I know if this formula makes any difference or if I should try to kick formula all together. And what are the chances this gas would still be a problem if I just breast fed.. I’m at the point i feel so bad for her I’ll do anything.