Hi Cathy,
You seem to have very good instincts about not wanting to "let her cry it out". Your daughter sounds like a "good sleeper" when things are right in her world. Many babies start teething around your daughter's age and that is something that could very well cause night wakings. When you say that she is restless, thrashing in bed, turning from side to side and that she is frustrated and can't get comfortable, you have probably hit the nail on the head. Those teeth hurt when they are coming in! How comforting it must be for her when you attend to her needs. In my experience working with lots of moms and babies, when the teething stops, "good sleepers" go back to being "good sleepers". But for now she may just need a little motherly TLC. And remember "this too shall pass", and in my humble opinion way too fast.
Mary Lou M
A little about me:
Mom of 3, college freshman, hs sophomore and 6th grader, practicing lactation consultant, labor and post partum doula, and childbirth educator. Long time breastfeeding advocate. Personally I feel very strongly that the bonds we foster with our children when they are babies, gives them the confidence they need to face the world and all it has to offer, when they are grown, all the while knowing that if they "really need us" no matter what we will be there for them.