Need advice.

My baby has bad gas I switched her forumla to gerber soothe. I'm just trying to find ways to help remedy her gas problems she's always so fussy and it doesn't stop. I feel bad for her becuase it hurts her. But I can't do the bicycle or certain natural remedies due to the fact that she is in a harness. So if anyone has a baby in a harness can maybe give me some pointers that'd be appreciated.