Sorry to state the obvious here, but they've heard you crying alone in the office and so naturally they're worried about you and concerned that you aren't ok.
(It sounds to me as though they're right to be worried; what you describe is not something that happy people do, in my experience).
Are you being paranoid? If you think that this means they're somehow "out to get you" then yes. If you just think it means that they're worried about how you're doing then no.
Again, sorry to state the obvious but that is what you seem to be asking... let me know if I've misunderstood.