I was in the same boat, and I’m a physician for crik’s sake.
I was diagnosed with MS after no one else could explain why I had visible holes in the myelin sheath of my spinal nerves. It debilitated me from a novice weight lifter to a shaking weakling. I even had my medical license limited to observation only, no direct patient invasive procedures allowed.
I quit diet anything and today (1 year later almost to the day) I am 100% back to normal and lifting heavy again.
My colleagues still poo-poo away any thoughts that I had Aspartame poisoning. In fact anyone during medical training who mentioned the words was labeled a “conspiracy weirdo” by the faculty and shunned.
While my practice is orthopedics, if I were to encounter anyone with my symptoms I would have to think really long and hard if I were going to “officially” diagnose them with Aspartame poisoning; but I have “unofficially mentioned” it to some people through this past year.