O.L.
As long as she's not showing other symptoms (and yes, teething can cause stuffy nose & extra saliva, which can make them choke some), I'm betting it's teething. It probably wouldn't hurt to talk to your ped to check on her ears & stuff.
My 9-month-old DS2 has been working hard on his first two on top... for well over a MONTH now! (Ugh.) It's not horrible every night, but at least a few nights a week he's up for at least an hour at some random time.
Motrin will help, except maybe on the very worst nights (and even then it'll help some). I also use that teething gel... it helps quite a bit.
I had braces as a teenager, and the memory of the *pain* when they would tighten them is what keeps me patient & understanding when my son is having that much trouble. Hang in there.
If you do get to a point where you have to help her re-learn how to sleep better, you might want to try Elizabeth Pantley's "No-Cry Sleep Solution" or "Good Night, Sleep Tight" by Kim West & Joanne Kenen. They're both great and will save you & your daughter many nights of tears and frustration. :)
Best of luck!