I’m almost 6 weeks post L.TKA. The first two weeks are a goofy, painful mess. My head was foggy and couldn’t sleep but short dozes. Pain med did not help me, just made me sleepy and have nightmares. Ice, NSAID, and elevating leg . Takes a while to find a tolerable position. Constant pain, worse with getting up, (I have long legs). You need a walker, ice machine, toilet extender with arms. And a cane. There are support pillows for knee surgery and this helps, but I was most comfortable in my tall bed with large sofa/floor pillows. Less issue standing up. I have 14 stairs to get to bed or shower and stayed on main floor first 3 days. Going up use your good leg first, going down use your surgery leg first. Gets easier over time. First two weeks are the worst. Better by third week and now improving slowing every week. Don’t beat up on yourself. This is a tough surgery!!