Sorry you have to have more surgery. I have had a bi lateral mastecomy and tissue expander on the left and skin sparing on the right with immediate implant.
I did not do the exercises with the second mastecomy, but did have to do them following the first because they did an ancillary clearance (removed all the lymph nodes). I was only in hospital for a couple of days but left with a drain bag on each side, I had no dramas with the bags, only the inconvenience of carring them around for 10 days!! which seemed like forever.
I am having my expander exchange surgery later this month.
Hope we have answered some of your questions, feel free to ask anything.
Tanya