Have you put all the symptoms and the patient's relevant history into GPT-5 (paid plan) to get possible diagnoses? Also, it may be an opportunity to do a lot of blood tests privately to see what they lead to. Sometimes it could be a viral or worm infection. Doctors generally miss out on a lot of tests, so it could be up to you to get them done. For the brain sometimes CSF tests are needed too. You really need to be prepared when you go to the doc, telling them which tests you want.
If you are truly convinced it's a bacterial infection, then you can use a broad spectrum antibiotic, e.g. amox+clav, which you can get on your own, but I would simultaneously take a probiotic twice daily to prevent the gut from getting colonized by bad microbiota, e.g. C diff. Even so, sometimes a different antibiotic is needed, e.g. doxycycline.
During the early months of Covid I had to take chloroquine. The point again is that no one medicine really is broad enough.
If you are truly convinced it's a bacterial infection, then you can use a broad spectrum antibiotic, e.g. amox+clav, which you can get on your own, but I would simultaneously take a probiotic twice daily to prevent the gut from getting colonized by bad microbiota, e.g. C diff. Even so, sometimes a different antibiotic is needed, e.g. doxycycline.
During the early months of Covid I had to take chloroquine. The point again is that no one medicine really is broad enough.