Cat shaking after flea treatment.

I accidentally treated my kitten with a store bought flea treatment meant for dogs and she began have serious muscle tremors. I immediately washed her with Dawn dish soap and rushed her to our vet. He was incredibly useless and offered little information.
As the night progressed, Abby's shaking subsided and she went from listless to alert within an hour of washing the medicine off. Today, 24 hours later, I notice Abby is still suffering from muscle spasms. We spent much of the night awake as she wanted to eat, drink and use the litter box, but seems to have difficulty with said tasks.
I had to hold her and pet her while she used her box and she has been able to drink, but seems to have difficulty eating as much as she would like, no more than a few pieces at a time. Abby seems to be having this bizarre twitches, I'm assuming neurological effects from the mistreatment. If we are petting her, she doesn't seem to get these triggers. When we aren't petting her, or if we stop, she has a twitch every 15-30 seconds. She will twitch her leg, lick herself, bite herself, etc. Each twitch lasts for about 10 seconds max. I am wondering if these symptoms will subside as the toxic chemicals clear out of her system, or will she have permanent neurological damage?
I don't want her to suffer, but I don't want to rush to have her put to sleep because she presently seems uncomfortable. She is still alert, able to purr, move about, etc.
I apologize this is so lengthy, but please, please, please help!!

Yes, I bathed Abby, immediately upon noticing her convulsions, in baby soap and then followed that up with Dawn soap.
She is doing soooo much better now! I just came home from work and she's almost completely back to normal. I really appreciate you responding to my question so promptly. It gave me great peace of mind while I waited for improvement.
Thank you again!