Organophosphates can certainly provoke seizures, but the hallmark of acute poisoning with them is flaccid paralysis, not seizures. In order to get into acute trouble, I’d expect you’d need to have been an ag pilot who fell into the malathion tank or something.
As a surgeon, I’ve watched a lot of med d students and new nurses pass out during disturbing procedures. When people have vasovagal responses, they often flop around like fish out of water for a while. I’m concerned that the “medical professional” that witnessed your “seizure activity” didn’t know what he was looking at. That being said, it’s impingent on you to demonstrate that you didn’t actually seize, and a sympathetic neurologist is gonna be your best bet.
No GP or nephrologist, (and certainly not a naturopath selling detox holy water) is going to get you out of this.