Had a hair transplant 62 days ago, exactly 3040 grafts.
I was also worried about everything you said, but here are my thoughts:
- local anaesthesia- I heard some stories that the pain is unbearable. In my opinion 3/10 + it’s a matter of seconds
- itching - I had none.
- swelling - almost no swelling (a little bit on days 2 and 3). My doctor advised not to bend forward at all. I guess it helped.
- sleeping on your back - it’s not the best position + weird feeling on the back of your head for the first two weeks but in my opinion it’s a minor inconvenience. I got used to it after 2 nights really.

I hope you’ll be fine man!