There is a Facebook group with 90,000+ long haulers in it from around the world, if you're interested in talking to others and hearing what has worked. Many people have done well with a low-inflammation, low-histamine diet. It helps relieve your body of that constant immune response. There are other simple protocols that work well too -- not just a prescription given for symptoms (not actual treatment of the root cause). Hang in there! It does get better. But be sure to be moderate with physical activity and exposing your immune system to anything new, that your body may react poorly to.