Reflux and milk allergy? OMG please help?

[willowlouise3307]

My 5 week old has a soy milk allergy, she is on Pepti Junior formula. Since she started this the crying and fussiness has cut down ALOT. But she still wasnt happy and not drinking enough formula each feed. And only gained 100g in a week. The dr is trying Gaviscon for SILENT REFLUX. As she had a few symptoms for that too. Well so far she has had 4 bottles with it and still no difference. I tried using the dummy then quickly putting in the bottle but as soon as she had milk she screamed. I wait till she is really hungry, then feed her she goes every 4 hrs. At first she sucks really hard for a long time but takes hardly anything. I am going to try the next teat up. She uses NUK its the only kind she likes ive tried many bottles and teats. Please does anyone have any experience like this? Or any advise to get her to drink more?