Oh geez, Laura, I've not had it like that before but it was all over my body instead like being under a broiler and having it turned on but not being told it was turned on.
You're gonna see the doc soon. If you're allowed to take that much medication, then don't worry about it until then. If that's all that's keeping you sane (and I have my doubts about THAT statement), then do it.
Of course, you could try hitting your big toe really hard with a hammer and that'll take your mind off your burning problem. I don't know..... it's a suggestions if you don't want to take that much of the med.