Glad you are getting back to the vet today.  It could be the meds (or not enough meds), or, as a boy, he might just be having a hard time figuring out the mechanics of it.  For the first day of so, Otis leaned up against (and peed on) the house so he could lift his leg.  Scents are very important to male dogs as well - one member was having the same problem, went to the vet once, and then the second day, drove his to the vets after hours.  All of the pee smell worked and the dog went.   Is there a special tree or bush in your yard or in front of your house where he (or other dogs) like to go?  Otis also felt uncomfortable on the lead in our backyard.  I took him outside on the lead, unhooked it so he could pee, and then put it back on to go inside.

i slept with Otis through the entire recovery.  I had a mattress on the floor on the first floor, and put his favorite dog bed right next to my head.  Much of what you describe, including the lack of sleep, sounds pretty normal.  Maybe the folks snoozing can let you take a nap this afternoon?

Hooray for pee!  Sorry it was in your bed, but as he starts to feel better, both timing and location should improve.  The Velcro dog problem should correct as well - my Tess was like that after she had cruciate repair.  It just meant that I brought everything I needed to do into the room she was in.  And with Otis, we placed a dog bed in every room on the first floor, so he could move from one to the other (and I, of course, tried not to move around too much from room to room).