Gassy baby HELP!!!

Samantha

Hey mamas!!! I need some help here, as I’m at my wits end. I have a 11 week old who is formula fed. She has had bad gas since day one, at this point we have done it all, I feel. We switched all different kinds of bottles and now are using the playtex ones with the bags, we switched formula once already to similac sensitive, we use gripe water, gas drops, do the bicycle exercises and belly rubs. I thought the new formula was working well for awhile and now the gas is back bad again. We now switched her to Gerber Soothe and she’s been on it for a little less than a week. Her pooping is coming out more firm than normal at first and then will go to soft. Her gas smells really bad. Is this due to the the transition from the old formula to the new?