Infant GERD question..

[ProudMommyof One]

My dd is now 6 weeks old and was diagnosed with GERD about 3 weeks ago. She never vomited and rarely spit up. She was just extremely fussy, congested, etc. She has had superb weight gain. She weighed 7 lbs 10 oz at birth and now weighs 14 lbs 5 oz.  When she was diagnosed, the pediatrician put her on Prevacid and Reglan. The Reglan was stopped the following day because of severe vomiting. She did not tolerate the medicine well at all. After we stopped the Reglan she did not vomit again. Two weeks went by and she was doing outstanding! We are thickening her bottles with 2 teaspoons of rice cereal per ounce and there was no more fussiness, no more spitting up, and no vomiting whatsoever. Now, as of Wednesday, she refuses to eat, screams all day long, and vomits up what little she does eat. She went from eating 5 ounces every 3 hours to 3 ounces every 4-5 hours. Could all of this be related to the Prevacid? I have heard that it can cause vomiting and stomach pains, but the doctor has told me that the Prevacid is all they can give her. I am at a loss as to what to do for her. She also grunts to the point where we, including my dd, do not sleep. It is the most horrible grunting noise I have ever heard.  I can only relate it to that of a pig..but not one..about 30. She is also very very hoarse.  If anyone has any suggestions for me, please help.  Her doctor feels there is nothing else that can be done. I am calling tomorrow for a referral to a pediatric GI.