What Will Actually Happen at This Appointment

I have [How You Describe Yourself] and I'm going to a [Type Of Appointment] for the first time on [Date]. Not knowing what will happen is worse than the appointment itself. What I'm most worried about: [What Worries You Most]. Walk me through it: 1) what happens from the moment I walk in — check-in, waiting, being called, the room, who I'll meet, in order, 2) what they'll likely ask me to do with my body and how long each part takes, 3) what will hurt, what will be loud, what will be cold, honestly, 4) exactly what I can say to pause or ask for a change, 5) what happens at the end and what I'll leave with. Be literal and honest. If you're not sure about a step, say 'this varies' and tell me what to ask the front desk when I call ahead.