I sense you frustration and empathize with your health problems. My post acute Covid 19 issues problems were cognitive memory issues, joint pain swelling/ extreme fatigue and insomnia (which exacerbates the fatugue). I showed my primary doctor research from Mayo and Stanford and he agreed to call in a prescription to the Mayo Clinic pharmacy for low dose naltrexone ((LDN) 4.5 mg) with NAC (supplements). It has helped enormously with energy levels, sleep and cognitive issues within 2 weeks. Find a PC who will be responsive, hear you and be amenable to accepting new research from reputable hospitals. Most professionals feel medicine is collaborative effort between patient and doctor, so being overly insisting about which tests you want performed may not be the optimal approach. You mention Cytokines which are mediators of inflammation. That and microclots appear to be the underlying mechanism of complex pathology of long Covid. Low dose naltrexone . LDN has an anti inflammatory effect. Measuring cytokines is not useful in my view because it’s too nonspecific and even if they are elevated, LDN is the only medication that works. Anti-inflammatory don’t . For microclots baby aspirin may help.