Acid Reflux experience

Does anybody have experience with their LO's having acid reflux? My babygirl is 2 1/2 mos old and she has had tummy issues ever since she came home from the hospital. She was 6 weeks early and was in the NICU for 3 weeks and didnt seem to have a problem at all there. Once she got home and was switched on powdered formula it all startes. Her little belly is so full of gas no matter what i do to help..i mean we have tried gripe water, probiotics, the windis, gas drops, tons of burping... Her Dr finally gave her medicine for acid reflux and switched her formula which has helped a little, & its only been a week of that so hopefully it will help eventually.