I also took Paxlovid when Covid 19 was confirmed. It may have helped or not as they blamed the long period of positive test results - 28 days on Paxlovid (Paxlovid Rebound) so beneficial or not - I'm not sure. What I do know is my right hip, right arm and right foot was experiencing pain on day 3 of the virus and within two weeks I felt like I had full body sciatica with my right hip hurting the most but both hips and both arms were now involved with all of the other LC symptom's.
After 14 months of "Wait, it will get better and a few X-Rays, my primary physician might actually believe me and I will have my first MRI to confirm and or dismiss Transverse Myelitis - an Autoimmune Dease that could be triggered by the Covid virus or some other autoimmune condition doctors don't really understand.

All I'm saying is - I would be skeptical of any of the vaccines, booster or medicines that were rushed to the public prior to sufficient testing and approval for covid.

As you noted NIH is starting a study on Paxlovid along with hundreds of other
studies on long covid. They are recruiting participants now - I would wait and see the results before moving forward as a treatment.

What I would do is push the medical industry for more proactive investigation on people that exhibit autoimmune symptoms. After all the vaccines were human's attempt at fooling the autoimmune system in fighting covid - now we might have hyperactive immune systems fighting our bodies. Could we have a potential "Human Error" - I would say better than a 50 - 50 chance.