During a bladder infection - for which I was hospitalised - many years ago, I was prescribed Pethidine for the indescribable pain. Instant, total and utter relief - paradise actually - but was floating around the ward for hours, possibly not good for maintaining normal day-to-day activities...?! I visited pain clinic once on another occasion to sort a persistent reminder of an old skiing injury, no Pethidine that time, but they certainly knew what they were doing, one jab of cortisone and I've never had a recurrence. Hope you get your problem(s) sorted.