Yes I’ve had a similar experience. Last vaccine end of November 2021, mid December started getting joint pain and stiffness. By first week in January 2022 my feet and wrists started burning and pain worsening in my hips, back and neck. February I had muscle wasting, fatigue, pain and stiffness in my neck, shoulders, arms, back, hips, legs and joints and the burning pain in my hands and feet was so bad that I became house and bed bound.(Before this I was very active, went to the gym and exercised daily, even built my own gym when Covid hit and shut everything down). Mid February had tests done and my CRP levels were dangerously high so they put me on 50mg prednisone daily tapering biweekly and was able to see a rheumatologist mid March who determined that I have an autoimmune disease and looking like RA so he put me on 20mg methotrexate weekly as well. This definitely helped me regain my mobility and although I still have flairups and some burning in my hands and feet, I was able to taper off prednisone completely and taper down to 7.5mgs weekly on the methotrexate. Still not anywhere near what I was 2 years ago but at least I’m able to function now and hoping someone can find a solution soon! (hopefully as quick as they were able to create the vaccine)