Worrying is bad. If you feel like puking the morning of, that is normal. Certain people were so nervous they spent the first two periods in Student Services puking up nothing.
Schedule issues clear out if you go to a good class and have a reason to go. Remind the people in charge of scheduling that putting you in a different class than the one you just got used to is stupid because they messed up on your schedule. Well, if you go to a class for a few days and then they tell you you are "supposed to" be in a different room even though your schedule says the room number, then this applies. Not sure what your issues are.I'm not talking from experience! No way!