I doubt that even the world's most experienced pet psychologist you could tell you exactly what's going through your cat's mind. However I do know that no cat will ever wash himself unless he's completely secure in his environment. (Cats will only wash when they're sure that there are no predators, such as dogs, or rivals for their territory, in the area). A cat who is washing himself is normally a very relaxed cat which, I'm sure, is exactly how you'd like your feline friend to be.
I hope that the op goes well.
Chris