ive had post ictal psychosis in the past, your not alone. Ive thought my parents were imposters, that i had infact died, seeing people look like reptiles & pigs, unreasonable fear, pseudo religious delusions of grandeur, etc so on, I also attempted suicide one time. It's scary stuff. I use gabapentin as an add on and it seems to make the fear a little easier to take, I also use 6-7 grams of fish oil daily. Short term valium can also alleviate symptoms if severe. (it wakes me up from a psychosis near instantly) RobinN has put in links about gluten, but I believe its the seizure rebound that causes psychosis, in a similar way to post ictal depression, rather than related to gluten in a TLE case. Psychosis & bipolar are of course well associated with TLE. I think self awareness can go a long way, human company can help with the fear and limit psychotic behavior (self harm etc), and bearing in mind that it will pass in a day or two. Its still a horrible thing to get through, and as much as it can be minimized, there's no easy solution, but I'm your brother going through the same stuff on the otherside of the world, and although I've feared going "crazy long term" for years it has always passed in the end. This is a thought to also remember! Fortunate for us a TLE psychosis will pass.
Im actually otherwise a quite sane person, I just happen to have a part time vocation as a psychonaut. (To sound like a total douche..I believe this is the source of both my weakness and wisdom.)
Although i wouldn't wish my experiences on anyone, and don't want to relive them, we are lucky to experience the breadth of the human mind, its frailties torments and beauty, and to come back sane people able to interpret our subjective experience rationally. It always passes!