All 4 are coming out June 15th. I'm REALLY REALLY nervous. I was given something to take the night before and morning of to calm my nerves. How essential is the nitrous? Is the gas what makes you sleep or is it a sedative by IV? Will I be knocked out cold or will it be that strange feeling from the gas? (Where it relaxes you so much you're sleepy but you're totally aware of what's happening feeling)