I suffer with focal epilepsy and is controlled, but i have small seizures that last 3 days but it only happens every 3 months do you have any idea why?

Diet?: Can get small break through seizures from time to time. Levels of anticonvulsants do fluctuate, and can be affected by diet, sleep, stress and hormonal levels. Be sure that your levels are therapeutic and be sure to let your doctor know about these events. Keep a diary of these events so you can track them over time and see if any patterns emerge.