I suggest searching the site
www.kellymom.com ~ I read there that Mama's diet generally has little to do with baby's gas. Their immature digestive systems are more likely the culprit. We've tried Gripe Water, simethicone, homeopathic drops, weak fennel and chamomile tea and none of them have worked well for us. What works is massage and leg manipulation to help expel gas, lots of burping during feedings, and having Luna sleep inclined in her carseat. I love co-sleeping but Luna is miserable if she tries to sleep laying flat. If I have her in her carseat (with a fan going next to it for white noise) she'll sleep 3-5 hours at a time at night.
Good luck! My first never needed burping and this poor girl needs it alllll the time!