this must be really hard, epspecially after getting sleep for so long.
there is hope - and im sure she will go back to 12hrs a night soon, my cousin has an 8 month old bub who did a similar thing up 2-3-4 times a night, now in the last few weeks it has settled back and he is back to his happy 12hr stints that he was doing before 5/6months when teeth started to get really bad...

i hope it doesnt last long.

Have you tried bonjella, or panadol to help ease the pain, it may get her to sleep that little bit longer?