Which formula for reflux!?

My 6 week old girl seems to struggle with feeding. She has been diagnosed with relfux and the doctor has advised me to give her gaviscon. So this is what i have been doing but she still seems to be suffering after each feed. Could a change in milk help? Or maybe something else?

The gaviscon has helped, she isnt being sick anywhere near as much as before but cant seem to stop the painful wind. 

Any advise?

Tags: reflux sick