But I'm too scared...

You oughta know.... that breast reduction hurts... duh... but you'll be surprised at how many people underestimate that. With or without painkillers you are going to feel sharp pains all over including your nipple (eheheh - you just said "nipple"). These are the things that you may take for granted: brushing your teeth = soarness; curling your hair/putting it in a ponytail = nothing because you won't be able to do either one. 

My anxieties... DRIVING and SHOWERING! I drove too early after surgery (5 days after) and it hurt. But it also scared me off of driving for another week. I would wait at least 3 weeks before getting behind the wheel. Showering is intense, at least it was for me. You can't  let the shower run directly onto your incisions - no problem - because  you can get the tape wet. BUT you are still too soar and hurting so reaching around your body to wash and scrub is HARD! I'd get a loofah that's attached to a stick, like a back scrubber - I would also shave or wax armpits just before the surgery so you don't have to worry about figuring that whole thing out post op.... i imagine it's complicated.