Now, to answer your questions:Because of nausea in hospital I was just taking Tylenol every 6 hours but suddenly yesterday extreme stiffness set in.Every hour or I do a few house laps and my knee literally feels like a 2x4. My swelling is minimal and today I'm trying some Norco to see if it addresses this feeling. so, my confusion is.. is this considered pain!? It does hurt, kind of a burning feeling and definitely limits movement. Should the Norco alleviate this?
Yes, the stiffness and "log leg" feeling are both forms of pain. At only 6 days post-op, it is not unusual for pain to increase. You will still have swelling inside your knee, even if it doesn't look very swollen on the outside.
Your pain and your nausea both need to be controlled properly. It is your doctors' responsibility to do this, so get on the phone and get your medications sorted out.
If your surgeon won't help, contact your own doctor/PCP.
It is simply not good enough for you to be tinkering around with your medications and asking us for advice. Doing that isn't safe and Tylenol is insufficient pain relief at this stage.
So far you've asked us to advise you about taking Lorazepam and now Norco. We aren't qualified to do that - only your doctors or a pharmacist can do that, and it is your doctors' job to do it, so sort it out with them.
There are other drugs combinations that should control both your pain and your nausea. Keep on at the doctors until you get something effective.
New Zealand

