Hi Mitch
I know exactly what you are going through! My son had always been a restless night sleeper but I do think that I played a big part because I would get up to him everytime he made a noise. my DS still has some bad nights but most now he sleeps through and he has a blanky. The biggest thing is that you child needs to be somewhat "independant". When I say that I mean does she put herself to sleep or do you assist her? I used to rock DS and feed him his bottle but as I needed time for me this just wasn't working and it was affecting his night sleep because he needed me to help him go back to sleep (I was his sleeping tool). It took time but now he holds his bottle and blankie and puts himself to sleep.
How do you find the growbags does she feel like she cant move around to change positions (I have never used one so I dont know). A really good book that helped me is Tracy Hogg the baby whisperer. She shows how to get your child to be independant with sleeping and there is a web site with a some great info on it. For me in the end sometimes I just had to let him cry and it did take a couple of weeks but in the end it stopped and we got some well needed sleep.
Hope you get some sleep soon!