Definitely what other commenters are saying. I felt the exact same withdrawal symptoms and yes you'll find they're most commonly described as "brain zaps".
When weaning off it really helps doing it in a controlled manner by gradually reducing the dose (ofc do it with professional guidance). Even so, I felt them at each step down but the body/brain got used to it after 3-4 days. It can get scary or annoying but it eventually dies off.
I need uranium, fast!