I can relate to the husband issues. 1 week post op for me we found out hubs had a recurrence of kidney cancer spread to his lung. After surgery to remove part of his lung (I was 2 weeks post op) he started infusion immunotherapy. His prognosis is great, but he's having some side effects. It is very stressful. And very sudden, but we're adjusting. I'm sure this is having some effect on my recovery and yours. Sleep issues, being on my feet more than I should be at times, fatigue,etc.
But, cancer takes precedence over tkr.
Sounds like you had a very busy day yesterday! That can definitely contribute to your feeling bad today. We are both in early times of recovery. Even tho it seems like forever. I don't know if Tramadol is contributing to it. You can try easing off and using tylenol.
Mostly, take a deep breath, be kind to yourself and take it slower. Try to relax and not worry about your knee. It still helps to ice and elevate. You will begin to feel better gradually. Get outside. Take small walks.
Sorry for going long here, but I can relate. Only difference is I've had tkr before and knew pretty much what to expect. Didn't expect this cancer curveball, though!