Mylicon and the "ILU" method and bicycles after. It worked so well for my son.
Are you breastfeeding or using formula? It's probably something you are eating or something in the formula. I had to cut out certain foods while breastfeeding and it helped my son's gas a lot. We also eventually supplemented with a formula and getting the right one made a huge impact on him.
Mylicon and working the gas out - try the backwards c massage on her belly, bicycle legs, you might be able to look up a video about helping her pass gas