Would Carlos or your mom do gentle (very gentle) massage of your calves, going nowhere near your knee, just gently moving up the legs? That might help your calves feel better. The tightness is probably due to swelling and the muscles adapting to working with the new knees. My lower legs were quite swollen for about two weeks. They also looked monstrously bruised.
For the conversation with PT, ask the therapist first what his or her plans are for you. That will give you a feel for what kind of therapist you’re dealing with. Next, you can moderate that plan by discussing your thoughts on therapy. How the therapist reacts will tell you how much input you will be “allowed.” Many therapists are happy to work with a proactive client. Others get grumpy if not in charge.
Above all insist on gentle exercises and NO manhandling of your knees. So many people come to us after a PT forced (maybe still forces) their knee, causing pain and swelling. They don’t “need” to see how far they can force your knee to bend or extend. They really don’t. The PT’s job is to help you gently bend or stretch your own knee.
Lecture over.
Let’s hope you keep sleeping so well! You don’t stop your pain meds, though, until you don’t need them. I’m pretty sure you still need something to help with the pain. One reliable sign you can stop pain meds is when you forget to take them. (Not because you slept through and missed a pill, that’s different.) Forgetting your pain meds is a sign you can move to something less powerful. Some taper them off early because of problems like nausea, but if you’re not having problems, stick with the program.
Three days and nights and you’re getting cabin fever?

I hope you recover quickly, because this might be a long winter! For what it’s worth, things are less tedious if you can move between nests and not live in just one. Nights in bed, days in the recliner, maybe a little time out on the porch... that kind of thing. You will become more mobile soon, another week or so, and that should help. Take a little walk here and there if you can do so easily. After another week, maybe a short drive in the car (Mr. Shoes did that for me in week 3 and it felt wonderful). Little victories are great for relieving boredom.