It’s only been 3 weeks since my full knee replacement surgery but I was told by my surgeon when I seen him at my first follow up visit I should be able to bend my knee 90%. Well I can’t bend it hardly at all without extreme pain . I can bend it a little then it just stops and if I push it the pain is bad. I can straighten it but I am worried that I can hardly bend it. My adult son keeps pushing me to bend it and it’s getting so frustrating that I can’t. Is this normal ? I started PT this week and even my therapist said it’s the tightest she seen so far. Anyone else having this problem ? Should I be worried ?