G.P.
My 14 month old seems to be getting his eye teeth and molars at the same time, then last week, a bottom tooth popped up. Needless to say, this is ongoing with him, and very intense. When he seems to be suffering quite a bit, we give motrin before bed. Teething tablets didn't work for my son, but I hope that they might work for you.
I would try some motrin or tylenol at night. If it is teething pain, this should give some relief and allow a good night's sleep. If it doesn't work, it may be something else, and you may want to take her to the doctor.