One of My Friend has knee surgery, he is also suffering from same Problem. it really difficult to walk in pain. he had surgery in India. i must recommend you to have proper chekup. if you want i ask my friend to share details of his surgery to you.
Likewise, I sometimes even find it hard to walk. It was really painful to move my left knee each morning. I don't feel the pain while I'm still sleeping and I can't even find any bruised. And my knee isn't swelling. I don't think this is normal. I need some help too.