Hi Kato,

It's always hard to know if it's better getting an explanation or not! I'm sorry you're still searching and hope your MRI goes well.

I just wanted to jump in with a link to B6 toxicity since it can affect nerves and cause GI symptoms. If you're taking any B vitamins you might ask your doctor about stopping those for a bit.

Can Too Much Vitamin B Cause Problems? - Ask Dr. Weil
Vitamin B6 (pyridoxine) Safety - Mayo Clinic

Take care. I hope you find relief and answers soon,