Welcome to the other side Hopefaith. It WILL get better. You will go for days thinking there has been no improvement, and then one day you will suddenly realize you aren't feeling a certain ache or are able to bend the knee a bit more going down the stairs. Take each of those ah ha! moments as cause for celebration because it shows progress. I just read through your thread and so much of what you have mentioned brings back memories! The sudden unexplained crying jags - no one understands them like someone who has been there. They do stop. Don't feel guilty if you haven't done every exercise or can't yet do a leg lift - you aren't even 3 weeks post-op (I suspect you are a little Type-A like me!). The idea of the quad set before the leg lift is a great one. My PT suggested using a belt or strap under the foot (much like when doing the slides), to assist with getting the leg up. I too worried because of all the pressure to get off the heavy pain meds asap. But read the articles here. Josephine helped me understand that if you need them, take them; she said there is unwarranted fear in the US that if one is on them too long they will become addicted. I should mention that one doesn't want to take them longer than necessary because of difficulties withdrawing from them, but she and articles here had excellent advice for me on how to withdraw gradually.
You will find so many here who have walked in your shoes - literally. And while each of us has our own healing pace and journey, their support and advice got me through my recovery. And we will be there for you as well!