Sorry to hear of your problems, especially a number 10 pain. I have the junior version of what you describe. I couldn't walk on my right leg. I have spinal stenosis which is the narrowing of the spinal column and can be caused by a few different things. My doctor said it's because of the 4/5 disc pushing on the spinal column. Anyway it's a back problem with pain in my right hip, knee and foot. It also goes up my neck and into my head. I have a constant dull headache. I have now gotten one epidural steroid injection and it has helped quite a bit. I had tramadol and meloxicam but dont want the side effect risks of long term use. Ibuprofen is helping where it made no difference before. I'm also doing the physical therapy exercises and riding my bike.
Thanks for sharing as I didn't know about the reverse effect that can happen with a pain killer. We are used to just doing what we need to do but are now more limited so it may be time to start paying someone to do some things for us. I joke with my wife that I'm now going down hill but I'm not really worried about it. We just have to adapt and keep moving on. If we just sit there we will be dead sooner. I hope your condition remains under control and you are able to travel. Be safe and enjoy.