My 1 month old is on Gerber soothe formula.. he constantly is fussy after he eats, constipated and is so gassy,…

My 1 month old is on Gerber soothe formula.. he constantly is fussy after he eats, constipated and is so gassy, sometimes it sounds like he’s going to spit up but it doesn’t come all the way up.. anyone know what could be causing all this? We also tried similac sensitive and it was worse.. we also use mam bottles and the playtex that is angled