If there's an OW, you will know soon enough. It's almost like the bigger question is the continuing mind games and the willingness to make you wonder if there might be an OW. WAS does nothing to alleviate the fear that they know must exist, thus they seem to use it as a control or torture method. Yes, only YOU can control your own emotions, but his taking vague weekends in the city while you are in MC seem a game to make you purposefully wonder while he's keeping you on eggshells over whether or not he will recommit to relationship.
It would be easy enough for him to be clear about whereabouts to put your mind at ease while in MC. But he won't. Have you brought this up as an issue in MC or will it be turned into you "trying to control him" when he's "free" because you are separated, but in MC.