Hi srm,
First of all, you are not a wimp. I had both knees replaced in 2022 when I was 67 y/o. Post-op pain is very real.
A TKR is a vey traumatic procedure, even when everything goes well. You mentioned the swelling and bruising, check. Sounds like the incision looks good (well, you know what I mean) and there isn't any apparent infection.
I had a pain med pump for the first 2 to 3 days. It was a diluted nerve block. That helped me get through the worst of it.
The exercises are hard and certainly do hurt, but as your ROM increases, the trigger point for pain is farther out.
What puzzles me is why you have pain at night, interfering with sleep. I didn't have that. I did elevate my operated leg when lying on my back, and put a memory foam pillow between my knees for side sleeping. And I iced my knee as much as possible. You might want to try this stuff if you're not doing it.
I hope that helps. If you are having severe pain though after one week past surgery, I'd go back to the surgeon to check it out.
All the best friend. FWIW I have been very happy with my new knees. I'm active, in the gym everyday, and best of all, pain free in my knees. I hope you get to that place, but it can take some time.
Joe
My pain the first 2 weeks was the worst
Had to get a stronger rx. Are you using an ice machine? I used that all day long. It really helped. My insurance covered the rental of it