Going crazy😭

Please help! Long story short my 4 month old baby has a dairy/soy allergy and is on Elecare formula (it’s been 4 weeks on it). I’ve tried breastfeeding, every type of formula, dr browns anti colic bottles, probiotics, gas drops, Zantac, gripe water, burping multiple times feeding, sitting up after feeding, even this hyoscyamine she’s currently on. She’s STILL gassy, squirming during every feeding almost, screaming in pain, fussy, can’t sleep because her stomach hurts....I can’t deal with this anymore I feel so bad. Feeding her anymore seems like I’m torturing her! She’ll barely eat 2 oz sometimes. She’s seen a GI and her pediatrician. They said she possibly had ulcerative colitis 4 weeks ago from the other formulas but said it should get better by now. She was seeming to get better on this formula but now it’s back to what it was before!! Please help!! She doesn’t see the GI again until the 30th.