S.D.
Try Gripe Water. It's homeopathic and usually works better than the chemical things like gas drops. You can get the commercial version called "Little Tummies" or go to the health food or natural food store and get it in the homeopathic aisle.
Any time a child has stomach or intestinal issues or has gone through a round of antibiotics, you should follow up with probiotics. They are naturally found in yogurt in small amounts, but you can powder or chewable pills or a yogurt-like drink that has higher amounts. The best type are ones that require refrigeration. I know at Whole Foods they have a fridge case that they keep all types of probiotics in. As for help, there's always someone who knows a lot about them and can help you pick what's best for your daughter.