Colic... help

I am mentally exhausted . My daughter is 8 weeks and cries non stop. We’ve tried changing formulas, seeing a GI dr and everything else!! Right now they have her on Zantac Twice a day and colic probiotics daily. She is on nutramagin for a severe milk allergy but I see no improvement. She is so gassy and cries for hours at a time and nothing soothes her. It’s to the point where I hear her cry even a little and my anxiety shoots thru the roof and I end up crying. I’m starting to get very depressed. I love her to DEATH. But I am at a loss and feel like I can’t help her ...