I feel it's beyond a fit. With an issue like this you need special attention. Take it easy, it's possible to ride with a splint but you must allow it to heal.
It may not be totally cycling related. Do research.
"I'm heading to the bike shop for either new/different handle bars or a new bike."
Handlebars are probably not the answer. It might be the frame. The position over the central axis and your pelvic, it's too far forward causing you to lean too much weight on the bars. It could also be your seat position, tilt. Stem might be too long. Top tube too long.
Next, your riding form might be part of the issue that developed over time from an incorrect fit or overuse. Check hip, rotate the pelvic down, if your seat is the issue you won't be able to do this due to pressure point. If you pelvic is correct you will have a flat back. If you back is rounded and shoulders forward or up you are reaching. You will need a new fit, maybe saddle/stem.
There are a lot of people that claim to be fitters. I only know a few that are really good, certified in several methods, have as much education as PT. Then the must understand age, loss of flexibility, and injuries.
Don't feel bad. I can't ride the bike I use 10 years ago. Neck fusion, lumbar surgery, and new lead to a custom made frame. I worked very hard to get some flexibility back and I'm still adapting. My position is getting better.
Don't be in a hurry! Do it slow and right. There is not a quick fix, it will take time. You need to have a good feel about the fitter. If they don't check your flexibility and do physical strength test, walk away.
If you want contact John, see the link. John is the best I know and I know many. He may know someone in your area. wheelandsprocket.com/about/wheel-sprockets
| current weight: 192.0