Hello from another transpo patient! Your arm is numb because they moved it to it's new 'home'. Enjoy it while you can...you may get nerve 'zaps' along it from time to time, which is entirely normal.
I slept on the sofa, surgical arm toward the back of the sofa, with my forearm pillowed across my belly. This kept it cushioned and elevated somewhat, which I believe helped keep swelling down. Back in '96, when I had mine done, they put you in a cast for 6 weeks and swelling was a huge concern. I had to have my cast cut, like a clam shell!
Follow your physical therapy instructions. Don't overdo. My P.T. rubbed emu oil on the scar and it is hardly visible now.
I will caution you that sensation may be different for you now. For instance, my forearm now reads 'cold' as 'wet'. 'Hot' is still 'hot'. I can feel 'itch' but not 'scratched'. You may or may not experience this yourself but I thought you should know so you can watch out for it.
Feel free to ask any questions you may have.
multiple surgeries for rotator cuff both shoulders with residual chronic impingement syndrome, ulnar nerve transposition, carpal tunnel release, wrist ganglionectomies/denervectomies/tenolysis, multiple herniated discs, tarlov cyst, whiplash, bursitis of hips, tendonitis, torus, 3rd degree shoulder separation, torn labrum, ovarian cysts, fibroid tumors of the uterus