hopestheory - I'm not a professional but this definitely sounds like OCD behavior to me. My mate is OCD and while every individual is different, the checking and rechecking of things, the ritualized behavior and the intrusive thought patterns and feeling like "something bad will happen" unless you do your "rituals" or pay attention to the intrusive thoughts -- these are ALL classic red flags of OCD.

OCD is *highly* treatable -- that's the good news! Prozac helped my mate immensely -- when his OCD first came on in his life, it was so bad he couldn't function at all and it was "driving him nuts" as you say, and once he got stabilized on meds he got it under control so that he was in control, not the obsessions & intrusive thoughts. PLEASE don't be embarrassed to go see a psychiatrist and get the relief you need. It's not your fault you cannot control these thoughts; it's a problem with your serotonin levels.