I don't know if this will make you feel better or not. But my PT scrutinizes my walk every session. I mean really gets on me about it. I told him the only reason I am limping now is because I feel as though my kneecap isn't tracking correctly due to all the quad wastage. He checked my kneecap and agreed that I had to build more strength. He then told me to walk again and try my best not to limp no matter what even if I have the pain or discomfort to walk through it. He said I couldn't hurt my knee.
I guess that's what I needed to hear. So when I got home, I packed my 2 year old in her stroller and went for a WALK. I focused hard on walking normally without limping. I got 1/2 way down the block and had a stabbing pain in kneecap area... I HAD to walk back. Ironically, I turned and walked back and the pain was gone. Okay, I was a little excited. So I went for another short lap forcing myself to walk normally. I kept hearing my PT say, you can't hurt your knee.
Well after my short walk which lasted about 20 minutes I was so excited to be walking outside again, I came in to rest. I really felt the muscles in my legs burning. The ones I have NOT been using for the past 2 months because I have been favoring my knee. I could be wrong but I am convincing myself that the stab of pain I felt was actually a muscle cramp or maybe some cobwebs being blown out haha.
Today, feeling a little confident, I drove past the mall and decided I'm going IN! I put my 2 year old in her stroller and gingerly walked from my truck to the mall (gosh I never realized how far the door was). It took me about 3 minutes to get there, yes I was walking slowly. I only went to a few stores and again some twinges of pain and cramps and stabs, but since I couldn't just go lay down, I was forced to walk back to my truck. Again when I decided to call it quits the pain was gone and the knee felt better. I kept on going. Again when I got home I could feel the muscles burning. I know this walking is good for me.
Only you would know your own body and what is and what isn't good for you at this time. But don't let the first twinge scare you too much. If you can try to push through it even once to try and see if it's a tweak, you might find that you can go further and longer without limping too bad.
Don't get me wrong my limp is not gone completely. But it is getting there.
My OS requires a normal gait for me prior to surgery so it's something I must achieve. Looking back I'm glad my PT is pushing me because if he didn't I know I'd still be in my brace favoring the leg and letting the muscles waste.
I know you had some very serious surgery and again, only YOU know what you can tolerate so you have to trust your own insticts, but I hope my story might give you something to consider for yourself.