I had a similar experience. I was healthy, working in my career in healthcare, I was training for a half marathon and I loved working out at Orange Theory 5 days a week. Loved going for walks and runs. Loved walking my dogs. Got the first Pfizer vaccine feeling slightly apprehensive but was reassured by media, medical community, scientists, governments, everyone in every facet of life that it was safe and effective. Working in healthcare career I believed the campaign. Literally 4 days after the shot I suddenly became systemically sick. Like crumbled during a zoom staff meeting. Headache, temporary vision loss in one eye, blurred vision, dizziness, weakness, I couldn’t walk properly because of it. Tachacardia not only when walking but at rest. All the time, bending down to pick something up or pat my dog would literally make me sick and dizzy and out of breath. Internal tremors, profound fatigue loud tinnitus buzzing in my ears especially falling into crashes/sleep and waking up. I got weird rashes. I could not read, concentrate and even had difficulty talking and thinking. This did not go away and despite all this my GP denied the vaccine caused it. Pushed for the second shot. The ER doctors denied the vaccine caused this. The specialists I saw gaslit me. Took the second shot because I believed what I was being told and within 24 hours I was in an ambulance with heart cramping chest pain sweating profusely and SOB. Still denial, ignored. Fast forward, I have never been able to work out again, I am chronically sick, I still can’t go for a walk without feeling unwell and dizzy. Still have loud ringing in my ears. PT for vestibular issues did not help. I was dx with PPPD; Chronic Fatigue; a year ago because of my pushing my GP I finally found a Rhumatologist who sent me for the right tests and they confirmed Lupus SLE and Sjogren’s Disease. I haven’t been able to work out since except I tried Pilates and that went well for about a year. I’m a competitive personality and I might have pushed myself too far and developed pain that I couldn’t tolerate and that lead to the Lupus dx. The pain began when I was taken off Amytriptaline (had been on it for years for migraines) I had developed numbness in my toes, going up my calves and my fingers and hands. Burning sensation tingling. Even in my face. My hair began falling out diffusely, lost 29 pounds without trying. The pain in muscle and joints and weakness in my legs was shocking. So I understand completely what your going through. Your not alone in this. Get your ANA checked to look for autoimmune conditions, try Pilates but gentle on a reformer so your supported but still getting some exercise without your heart rate going crazy.
What makes all this worse is being treated like you’re crazy by the medical community. Your NOT! Keep looking for answers…I am taking Natokinese; Bromelein and Curcumin/Tumeric. It’s supposed to help with the spike but I’m not sure that it is. Good luck to you!