Is there any epilepsy that does not cause physical seizures?

Hello doctor,

I have been suffering from a wide array of mental symptoms for around nine years. Some years ago, I went to see a neurologist. He took an electroencephalography (EEG), and found "epileptiform activity", I think in temporal lobes. So he said I have epilepsy and prescribed Valproate. He said my depersonalisation and anxiety were caused by my epilepsy. However, I never had a physical seizure nor an absence and neither have my family noticed any. Also, my symptoms did not improve after one year of Valproate. To make matters worse, some months after quitting Valproate, I developed a psychosis. I have also tried other antiepileptics as part of my treatment following this episode. These include Gabapentin, Carbamazepine and Phenytoin. My symptoms have not improved. Generally, I am feeling malaise and psychotic-like thought patterns after sunset, with anxiety, social anxiety, etc. Could all of this be caused by some underlying neurological problem? Why did the EEG show epileptiform activity? If I do have epilepsy, in spite of not having seizures, why have not the antiepileptics done any good? Are there epilepsies that do not cause physical seizures and also one is not aware of absences because they are very short? Can this type of epilepsy also cause psychiatric symptoms? What would be the best medication for my case? I took a single photon emission computed tomography (SPECT)/positron emission tomography (PET) which showed reduced blood flow to the right frontotemporal lobe. The magnetic resonance imaging (MRI) scans were normal. I also have enlarged liver, rapid heartbeat with palpitations, Epstein-Barr virus infection, history of high eosinophils, history of allergies or bronchitis, history of folliculitis, childhood meningitis and chronic diarrhea (10 years, diagnosed as irritable bowel syndrome (IBS)). Recent results showed elevated gamma-glutamyl transferase (GGT), low blood chloride, elevated morning cortisol and adrenocorticotropic hormone (ACTH). After the psychotic episode results showed low blood potassium. Currently, I am taking Aripiprazole, Phenytoin, Gabapentin, Amoxapine and high dose of vitamin B3 and B6.