@Nyc1961
Sorry to hear of your negative outcome post THR. After reading your thread a few things stand out. It seems majority of your issues are due to swelling. Bursitis, Tendonitis etc.
Naturally you will swell post any surgery, however the anterior hip approach causes ALOT. Quadriceps, glute, hamstring and the joint. Post operative care should be to rest and reduce swelling ( you have had major surgery ).
The effort to increase Glute strength by your physician and PT's are so that you can stabilise your hip joint. In someone your age, i would of expected a thorough pre-op strengthening program. The stabilising muscles in your glute are activated by small controlled movements which you build over time. This strength gained will assist in taking on correct load in movement and relieve the other muscle structure's in the area, which sound like they are already overloaded.
When you have THR, the way in which your joint works differs from before, resulting in all structures in the area to " wake up ". If you have had long term issues with the joint then it is possible those structures can be irritated for longer periods of time. If those structures are not working properly and your gait is affected then you will have a joint that does not work in the manner it should, causing symptomatic responses in the surrounding area.
If i was in your shoes i would see My doctor. Request blood tests to test for underlying conditions that can cause your symptoms - Perhaps see a Rheumatologist if your Doctor thinks its viable to check for any underlying Auto Immune Disease.
BUT most of all, i would get a second opinion. Your anxiety is caused by not knowing what has happened, why it has happened and how to fix it. A second opinion will go a long way to remedying part of the worry.