Yeah, been to numerous docs. I found out I had a bacterial infection from Mycoplasma Pneumoniae, which I treated, and it slightly helped. I also found out I am hypogonadic, which I started Testosterone Replacement Therapy (TRT) for about over a month ago. Both of these could cause brain fog, depression, anxiety. I also suffer from chronic rhinitis (turbinate hypertrophy), and meds such as antihistamines and nasal steroid sprays dont treat it. I've been to over 30 docs in the past 2 years, and this is so far what I got. I treated maybe 70% of the brain fog. So many docs just said its all in my head, especially GPs from the NHS UK... Oh they were so wrong. I also went to a psychiatrist and a psychologist, the former diagnosed me with "internet addiction, adhd, and depersonalization" and the latter said that nothing is wrong with me mentally and that I need to fix my physical health issues first. Apparently brain fog is a symptom that can be caused by many different things, and most docs really dont know what to do about it. I am pretty sure if I was in the US I would solve this pretty quickly there as docs are much better.