S.H.
Pacifier or not, a teething baby WILL be uncomfortable... and wake and be in pain and cry. My son woke up TONS whenever he was teething, crying ans screaming. Some nights I just had to sit with him and hold him in the dark and he was in such pain.
Next, at about 6 months old is a GROWTH-Spurt time. A baby gets hungry. Are you feeding her on-demand still? A hungry baby will be not happy and will wake and cry. In a hungry baby, a pacifier will only temporarily placate the baby... not satisfy it. If they are hungry you need to feed them.
Per OUR Pediatrician: for the 1st year of life... and baby needs to be fed on-demand and breastmilk/Formula is their PRIMARY source of nutrition... NOT solids and NOT other liquids.
While she is this young, and if using the pacifier, you WILL need to go and put it back in her mouth... since she cannot do that by herself, yet. Or, put several pacifiers in the crib with her... so if one falls out there are others. But, she is a young baby, and not able to just grab it and put it back in her mouth, yet. If she could, she would.
I would, try teething things for her... there is the Hyland's Teething Tabs that are homeopathic and natural. That worked for my kids.
There are SEVERAL things going on at the same time, which is not easy for the baby. Her reflux, her teething, her hungry, and at 6 months they go through a LOT of developmental changes. THIS ALL affects their sleep... it is not easy for them. But it is a phase, but will recur anytime there are developmental changes/growth-spurts.
All the best,
Susan