I have OCD checkers and OCD counters. Like you i have to do everything in a number of 5. Before i go to bed i turn my alarm clock on and off like 10 times and i check where everything is for the next day, when i close a door behind me i have to recheck if its closed when i know it is, whenever i get my debit card back from a shop i have to keep checking its in my wallet. Etc.