Oh wow, you are doing great! I was as sick as a dog after my first surgery. Apparently gas and I do not get on. I imagine you have a drain which is rather icky at first but you do get used to carting it around with you. I had a bit of a cloth tie around the neck bag to hide mine and just used to hang the drain bag on the taps during my shower. Make sure you do the arm exercises as much as you can. My physio said I couldn't hurt anything doing the exercises and to go for it as much as possible. The aim is to be able to comfortably raise your arm above your head again; something that can take several weeks to happen.
Fingers crossed your pathology results come back in a week or two with no lymph node involvement and they got to the bottom of it all in one go. You will feel an odd sensation as your nerves try to reconnect and repair themselves after surgery, rather like bugs under your skin and while an odd sensation, it is quite normal. Have a nice quiet Christmas now, well done you! <3