My daughter is 12 months old and is very gassy. How do I get rid of it?

My daughter is 12 months old and has sooo much gas. We are on Nexium for acid reflux, Mylicon drops don't seem to help, and she is on Good Start 2 Soy formula for older babies. We have tried gripe water and colic calm over the counter aides and still gassy. We can feed her for 3 oz. and help her burp and we will continue to get lots of burps up till the next feeding. She won't nap if she has a burp because she will wake up every 15 minutes to burp. The doctors just tell us she is a gassy baby....really? Thats all you can tell me? Any help or tips would be apprciated. We are looking into goats milk. Any other suggestions? Oh and we use probiotics when needed. Thanks!