Hi Rachael.

I had a single mastectomy, full removal of lymph nodes and a implant reconstruction at the beginning of October at 36 years old. Prior to that I'd had chemo. 
I stayed in hospital overnight due to the reconstruction, it was recommended. My experience was good. The surgery was long but went well. I just slept on and off all day and was given paracetamol and ibuprofen, nothing stronger which was fine.  I just found I was very tired and not in as much pain as I assumed I'd be. 
I had two drains and a pico dressing which were all just annoying having to carry them round everywhere. If you have drains a great tip is wear your dressing gown inside out and they will fit nicely in the pockets and everyone else will just think you can't dress yourself. A few days after surgery the pain got a little worse just under my breast where the incision was and I was immediately given codine which helped. I only struggled with this on and off for a few days. I found I ached more as opposed to being in pain. I've had some physio and seen my surgeon a few times to check the healing and dressings. My first dressing change was also not too bad as I was still numb. Nearly a month later I'm still a bit numb and a bit achey but have much more movement in my arm.

My mum had a single mastectomy a few years ago in her 60s and left the hospital the same day and had afternoon tea the day after at a cafe. She found the process also not too painful.

Good luck with your surgery.