I totally sympathise with what you're going through, my DS is nine months old and still waking up alot at night because he can't resettle himself. He has a dummy but I'm at the point with him now where I put three in his cot and he has to get it himself...but your bub is still a bit little for that trick.

Even though she's slept through the night without feeding previously by the sounds of it, I really wouldn't rule out that she's hungry. She is only three months old and that is still quite young to go all night without a feed. It was this that kind of made me wonder:

as soon as i put the dummy in she closes her eyes and goes back to sleep, but she is so restless and keeps turning her head from side to side, and then the dummy falls out and then I'm up again. really struggling.
To me, this sounds a bit like it's not so much about the dummy - she'll settle for a little while with it but is still restless so I'm wondering if there's something else going on ie. that she's hungry. Have you tried feeding her to see if she'll settle for a few hours after that? WAking every ten minutes like that just sounds like hunger to me...just a thought.

Hope you get some sleep soon it's absolutely horrible being woken up all night long like that, pure torture