Apart from my OCD, I'm always thinking worst case scenario over every minor worry or slight bit of conflict e.g I'm handing in notice at work & obsess that my eccentric boss will fly off the handle and try & keep money owed to me. I had a minor verbal altercation with a colleague who couldn't handle friendly banter & he made an indirect threat & despite seeming to patch things up I'm now watching out for him in the street in case he tries to ambush me leaving work. Any GP's appointment & yearly routine blood check fills me with severe anxiety that this is the time they'll discover something fatal. Apart from regular obsessions & compulsions that come & go, I'm convinced that obsessive worrying over catastrophic hypotheticals is closely linked to OCD.