L.A.
the advil and orajel you give her before she went to bed probably has worn off by the time she wakes up.
I can't speak to the reflux, but if you feed her in the middle of the night, you reinforce her desire to wake up in the middle of the night.
I would recommend a top up feed before she goes to sleep, then do nothing but soothe her in her crib at increasing intervals until she goes back to sleep. (Dr. Ferber). You will have an angry little girl for 2-4 nights, but you will have your sleeping angel all over again when its through.
Good luck to you and yours,
F. B.