Hey man,
That swelling is going to be miserable for a while. Do you live in the area or will you have to travel once you are released to go home? That travel day for me (on day 18 post op) was the absolute worst. I live in Wisconsin so it was a full travel day between airport, layover, drive home from airport.
With the packing, yeah it's tough because you really don't see a lot of progress straight away. And you definitely don't see progress day after day. I'm not sure if they explained it to you the same way they did me but they said it would be weeks of nothing looking different then it would make a ton of progress all at once. That was exactly correct for me. It was about 5 weeks of no change at all followed by a couple days of rapid healing. As long as you are not packing it tightly, you shouldn't have to worry it's making it worse. I thought that too, particularly with the opening in front, but it healed just fine. Anywhere I was weeping from by 2 weeks, I just put packing in. Your separation underneath sounds the same as one of the ones I had (if I'm interpreting right). If so, I found the easiest way was to fold a piece of packing or gauze and just tuck it up into the crease/incision under my scrotum.
Hopefully once the swelling dies down further (and that took 2 months to feel better and 3-4 months to feel 100% for me), urinating will be easier on you. Everything gets easier as you heal, definitely. If you're concerned about the urinating with your incisions, I would just ask Dr C when you see him Tuesday what he recommends. Maybe there would be a way to prevent it from running into your incisions or at least a way around having to shower every time you have to urinate. That's gotta be miserable.
Keep me posted, man. Keep your spirits up. I went through a tough patch for a bit when I didn't feel like I was healing quickly enough. I typically do get a bit of post-anesthesia blues and having healing issues did not help in the slightest. But you will heal up. And you will get through it.
Will you be going back for testicular implants? If so, it may be a comfort that they can fix or improve a lot of minor aesthetic things in that surgery as well. I know knowing my maximum amount of time dealing with the last two issues I have was only til April was helpful to me.