Oh, this must be so stressful for you!
With the acid reflux, is she taking anything for that? If so that should also help with the gas. You can also massage her lower tummy to help alleviate the gas bubbles.
There are many remedies out there to keep their head elevated while they are sleeping (wedges, towels, etc) which helps tremendously with digestion and reflux problems, but we got a baby hammock when my son was 8 weeks old and he almost immediately started sleeping better and for longer periods of time. Check out http://www.ambybaby.com
It's an amazing product, my son slept in it until he was 6 months (But they can sleep in in longer). I was a pretty "by the book" kind of mom that didn't buy into a lot of those gimmicky things out there, but I was so glad I got the hammock! I have lent it to many friends who have also had great results with it and I know you can get them discounted on ebay. And it's relatively portable, so we could take it with us to grandmother's etc.
Anyways, good luck I hope your baby and your family find relief soon!