I have been noticing today that I do this. I am constantly checking to see if everything is okay. I check to see if my keys are in my purse multiple times a day even if I just put them in my purse, I still check. I just got something for an early dinner and had some milk and was worrying I'd had too much milk. (I use it for my protein shakes.) I do it with things that aren't physical too- like if friends might be mad at me, I have to check in my mind if they are over and over until I am certain that they are not and if they ARE mad at me, then I get upset. Is this a bipolar thing or just a weird me thing? I'm trying to think of other examples. I invited two friends to do something with me today, and both cancelled and I told myself "I knew they would". (They don't know each other.) I'm supposed to see a third later tonight, but I don't expect he will cancel- at least I hope not. I park my car and I'm rehearsing where I put it over and and over again in my head because I'm terrified of not finding it again.