Have you tried getting a second opinion about the brain scan? I don't know anything about brain scans myself, but if it was me I would want a second opinion about that white area.

I have had some of the same symptoms you have. I experienced numbness in my entire body for a few days, then I lost my sense of taste for 2 months. Around this time, I had severe stomach pains and lightheartedness.

I have hypothyroidism, but it has been treated successfully and I don't think it could cause these problems since my thyroid levels are normal.

I had an MRI and they said nothing was there. They told me it was anxiety, but I actually think I have less stress/anxiety that the average person.

So I don't know what is going on. The reason your post attracted me was the lost of taste. Was it an entire lost of taste. This is called ageusia. Or was it partial? Mine was entire.

Did the doctors say anything about your taste issues? They had no idea for me.