My cat was poisoned now acting strange?

My cat ingested some bug killing product for the garden. She was dizzy, running into walls, drooling, and could not stand or walk. We took her to the pet emergency clinic. They kept her over night and had fluids on an IV and injections for the poison. She is ok apparently. She is just acting weird. She does not want to eat unless it's human food... She has been sleeping all day, and she has not meowed. Usually she's quite the energetic and loud cat. She's also extremely affectionate,and ever since she got back she shows affection but not to the extreme. Will she be back to normal any time soon? Or is she like traumatized?