That would be my plan too, a smallish increase to settle the pain. 5mg seems quite a bit, but that's up to you. You know the last dose you were on, how bad the current pain is, and what your doctor would consider a reasonable move. The reduction you've been doing sounds brutally fast - no wonder pain is back. Having to raise the dose after a too-fast reduction increases the cumulative dose, no good. Hopefully your pain settles with a small increase you can sit on for a few weeks.