I haven’t been to the doctor yet but my symptoms fit. Yeah, my taste buds have changed but I can still taste foods. I took a Covid home test recently and it came up negative. People with migraines have a higher risk of contracting BMS. A cause may be depression and I’m going to discuss it with her when we meet soon. There are other causes that you may want to look into. Cough drops help. At first I thought it was cleaning with harsh chemicals like bleach and ammonia because I’d feel a slight burning then. It was intermittent but now it’s all the time. I took Imitrex recently and the burning sensation seemed to go away. Oh, and I love coffee which does taste different to me now.

Interesting that you say that: lately I had a change in my taste too. What is it? ( not Covid, I tested negative 4 times).
What could it be?
All of a sudden I cannot eat anything that has artificial sugar i.e. sweets, cakes, cookies, bread, sugar for coffee etc.