Oh, my aching back

I remember that quote from somewhere in my younger days.  A quick google search tells me it probably came from an episode of "All in the Family," when Archie was in a car accident.

But it's applicable today.  I had to make two hospital visits and, as luck would have it, both people were in the same room.  But by the time I finished with the second visit, my back was giving me fits.  It had been behaving itself rather well a few weeks ago, but now it's back to its old, reliable, painful self.

I have an appointment with a doctor in just over a month, and I'm terrified that it will choose that week to be good.

Is it wrong to pray for pain?