its a common theme for me to worry about every little mistake error wrongness etc the way i have started to think about them is to accept that there was a mistake and think about any implications actions that i need to take if i realize it is just for reassurance then i have to say to myself heck with it multiple times to get over the urge it helps to avoid repeating the whole thing over and over so essentially repeating any words like 1212 or any of ones choice helps provide the calmness it works because it provides awareness for the specific item longer term mindfulness meditation helps to bring back the thoughts to allow one to just be is what i am hoping for