Sounds like the change in venue, the "new" arrangements (sorry, not meant as a pun :-) are giving you pause? Is this one of your first outside-school sorts of experience? You have a "regular" gig going not at school or really under school auspices, almost like you are out and working as a musician full-time. The forerunner of what you hope is to come could be getting your unconscious a workout getting ready for that "unknown" and experiences that could be more chaotic than usual and where you have to rely more on yourself to get wherever you need to be for whatever you want to be doing, etc. No teachers telling you, "show up here at 8:00, don't be late, we'll have a run-through at this time and everything will be all right".