I have recently given up BF. My daughter is on enfamil newborn right now and seems to be very crampy/gassy and fussy the past few days. She literally turns bright red trying to strain to push out a bowel movement. It is the saddest thing

Any suggestions on formulas to try?? Enfamil gentlelease and Similac Sensitive were both recommended to me by friends. My pedi seems to think they are all "gimmicks" and won't make a difference. Any suggestions or feedback would be helpful! TIA
Re: enfamil gentlelease vs. similac sensitive??