@Highland Girl - I wouldn't worry too much about your bend. That will get better also with time. Good for you for getting off the opiods but are you still on the opiate-based liquid? Getting off all of it will help lift some of your fatigue. You are only at six and a half weeks, which I found out from this forum, is a short time frame for healing. I was at the same point you are when I was at six and a half weeks, exhausted and couldn't do the things I enjoyed doing. It is not easy, especially if you are impatient like I am. My surgeon made it sound like I'd be doing so much better at that stage, and she was so wrong. Surgeons have no idea how long and difficult recovery is for most of us; they might change their tune if they had a TKR. A lot of people here have found out it can take six months, nine months, to start feeling better, and a full year or even more to really feel back to normal. I know, it sounds dreadful!
I am at four months and still have pain and bad sleep, but I seem to be getting better each month. I hope you can get some help with your garden. At this point, it's too much work for you. Also, see if someone can help with the shopping--a fall is the last thing you need, and shopping is stressful for your body. At this point, you'll want to elevate, ice, and take it easy. When you feel stronger you can try taking short walks and later on, months perhaps, you will be able to "nip" down to London. Until then, can they come over to see you? Or keep in touch by phone? I know, it's not the same. But you just cannot overdo it right now, you need to heal.
You and your family should be aware that this is a long recovery. You didn't break a leg; you had a knee replaced. From what I've read, it will get better and better, and one day we will both be happy we did this. Remember, when you feel down, which is inevitable, we are here for you.