Anxiety can absolutely cause frequent feelings of deja vu/jamais vu/depersonalization/derealization. I'm dealing with it with it my kid right now. He has terrible allergies and we started him on a new med that caused a fuzzy, foggy feeling as a side effect. He kept it to himself, worried about it, freaked himself out over the idea it might be something serious and started developing the deja vu/depersonalization feelings a few days ago. Once we talked it out and he got some reassurance, he's doing better. If you had normal MRI and normal EEG, the chances of it being a seizure are very slim.