I saw some others recommended Colic Ease and I agree-my daughter had mild reflux and we tried meds but they didn't work-they made it worse. I highly recommend the Colic Ease brand. If you would like to buy it locally, they sell it at the Family Health Market on Preston Rd in Frisco. I say give it a shot.
Meanwhile, I would also recommend researching reflux to see if you are seeing any of those symptoms. Reflux is usually characterized by arching of the back, crying during feeding, and a squeaking sound as baby feeds. While meds help some babies, sometimes a change of formula helps other kids. In my case, the Colic Ease gripe water, plus a change in formula to the Gentle Ease greatly reduced the problem. And by about 8 months of age it had completely resolved itself.
Definitely talk to Dr. before trying any formula changes but I would say go ahead with trying the gripe water. It's inexpensive and more natural than meds, you will know pretty quickly if it's helping your baby feel better.