Gassy baby

Katie
Hey mom's my baby is 3 weeks old strictly bottle fed and he's def uncomfortable from gas I have tried massaging his belly doing the bicycle legs and even gas drops.. nothing seems to work I have a hard time getting him to burp and I'm thinking of switching his formula to similac sensitive..what did u guys use for ur fussy and gassy babies and does anyone have any feedback of the similac sensitive. Thanks guys!!