It’s impossible to get “stuck” in hypnosis. The hypnotist is always present and will bring you out of hypnosis if necessary.
But it is possible to stay in a light hypnotic state for hours after a session, which is sometimes called being “in a trance”. This doesn’t worry anyone, because you’re still aware of what’s going on around you and you’re still in control of your actions. In fact, you’ll probably feel better than before the session.