I had horrible sciatica after surgery and I was referred to a chiropractor who helped me so much it was like a miracle. My hips were totally out of whack and once he realigned them, the sciatica gradually disappeared. It sounds like sciatica is a big part of your problem.
One thing that works at home is to sit on a tennis ball positioned squarely where the sciatic nerve comes out of the hip. Hurts a lot, but it really does relieve that pain after 10 minutes or so. As far as the inside pain, my PT said my body was trying to tell me something about the way I was standing and walking. If you turn out your foot and your leg "manspreads," ..you're putting force on the inner knee. Try paying attention to the body mechanics of sitting, rising from the sit, etc.

Hi @texk - Welcome to Connect! Glad you found this forum. I am 12 weeks out from my 2nd TKR. I didn't have that kind of radiating pain, but I did have numbness on the left side of the knee. It's almost gone now, but my doctor had warned me in advance that it might happen so I wasn't too worried about nerve damage. Are you still in physical therapy? Can you ask your therapist about ways you might alleviate some of the pain? Wishing you the best.

Hi Sorry you are suffering such terrible pain I had TKR just 6 weeks ago and from the word go I have had burning pain down the inside of my thigh past my knee to ankle Also on outside of thigh down leg to foot which is numb but burning as well My big toe feels as if it is being sawn off On Lyrica for 2 weeks but not helping much Had CT spine last week awaiting results Dr thought pain could be due to Spinal block irritating nerves or clot or infection Not anything like a sciatica pain I have had in the past Will let you know if I get any answers Take care