Baby fussiness

My 11 week old has been so fussy recently but, only 10:00pm-2:30am and I’ve tried everything for him and his formula has been changed 3 times by his pediatrician for spitting up, vomiting and the fussiness. They say he has colic but, he doesn’t have it. He’s been having severe gas issues but, is given medicine everyday prescribed by his pediatrician. What else can I try to calm my baby down 😔 he does have stomach issues due to the nurses changing his formula twice when he was breastfed when he was born and did not tell me he was being formula fed until being discharged. Now he will not breastfeed or even drink it in a bottle. He prefers his formula instead. He was on Similac sensitive, then Enfamil gentlease, then was recently changed to Similac alimentum and he constantly spits up or throws up huge chunks but, his doctors wanna keep him on it to see if anything improves