Spike, really sorry you're having these troubles.
I know our first thought when pain hits is that the implant has gone bad, I know mine were. I'd try to clear your mind in steps, addressing each possibility. There's no reason to think you need a revision until someone knowledgeable sees a glaring problem.
A few things that I could think of - you're an experienced hippy, so you know how your body should react to a resurfacing:
- I'd first clear your mind on whether something is mechanically wrong with the implant. If you want some other opinions, there are the surgeons on this site who can interpret your xrays and can talk to you about their thoughts. You can also mention the pain and see what they think.
- If the implant is Ok, then I'd take a look at the length differential, like you've brought up. Maybe a show lift for the other foot might help, but I'd talk to someone knowledgeable about it. I had a problem with my foot that I think came from my gait, a podiatrist helped me with that.
- There's the possibility of nerve issues, but when caused by the surgery, they seem to happen right away, not delayed.
- Since there's groin pain, you could also look at IT band issues.
The best thing to do in my thoughts is to get a professional opinion on anything that concerns you from someone you trust. If your surgeon doesn't have that (or maybe his PA), then get one from someone else. If the other issues are a concern, talk to specialists in those. Like I mentioned, a podiatrist really helped me with my foot after my second surgery, so to each doctor his own.
The spondylosis and facet disease can manifest like you're describing, so it may be that, but you want to isolate the possibilities, so you can at least know what it is you're really dealing with. The doctors listed on this web site can at least help you identify any issues with the HR.
Good luck, hope it clears up and you get another good HR.