@sandy9 I think you came to exactly the right place with your concerns!
I'm so very sorry for your ongoing pain. I am 9 months out and still have terrible pain and, like you, standing or walking for any length of time is impossible. If I want to go to a museum, my husband has to push me in a wheelchair. Not exactly my desired outcome: I told my surgeon I wanted to be skiing in 4 months and he said, "you got it!" Needless to say, if I'm to have the other (R) knee done (don't know how that's possible all things considered) I'm seeing a different surgeon. I saw a well known surgeon in Boston, but that was a consult about how/when/if to do the L knee. I learned that most surgeons will not examine or comment on your original surgery knee until you are one year out … and you're beyond that!
There are 2 specific things that strike me about your pain: your PCP's advice to take acetaminophen between does of Vicodin seems questionable because Vicodin also has acetaminophen and too much of that can be very toxic. Have you considered seeing a pain specialist?
Second, I'm concerned when you say there are times you want to lie down and not ever get up. That thought has flashed through my mind too. All this is very isolating and depressing. If you have this feeling often, please reach out for help. I'm glad you started here.