Hi Patbike
I just got through reading your thread - I myself had bilateral TKR 10 weeks ago and lately have been neglecting the single knee replacement folks - sorry!
A comment on ibuprofen, etc.: Don't fear the hydrocodone. Your story is much like mine in that I experience more pain and discomfort during the night than during the day, generally, unless I'm doing a lot. I am unable to take ibuprofen or any NSAIDs due to a stomach bleed last year - I had pounded aspirin, ibuprofen, and finally naproxen for decades, though the dr. said the ulcer they caused was probably fairly recent. So be careful with that stuff; note the insert stating that stomach bleeding can happen "without warning and can cause death." It's no joke. Hydrocodone is better for your stomach; I am lucky in that I have no "icky feeling" from taking it. In fact, I often have the experience you describe re: finally taking the pill after I've already been having pain, then feeling very "up" and wondering why I hesitated! Occasionally I will also take a hydrocodone in the a.m. if I really can't get going (though now it's been a few weeks since I've done that). Typically I need one mid- to late-afternoon after PT, doing errands, etc., then one when I go to bed. I've gone from always taking one in the middle of the night (as you do) to only needing one occasionally.
Sleep: I still battle sleep. Last night was great - I think because I was in alone my own queen-sized memory foam-enhanced bed after two nights spent in a dreadful lumpy old double w/my husband (he is at a backwoods fishing cabin for a few weeks) - NO sleep there! - followed by a 5-hour drive, followed by PT. But tonight might be back to the whole sleep 15 minutes, wake up for 15 mins routine. I try not to stress over it and assume it will improve over time. Often I lie down around 9 because it just feels better, then watch TV for a couple of hours on my Kindle.
Food: I ate more ice cream and cookies in two months that I usually eat in two years. I was particularly hooked on chocolate shakes; then a local drive in began (evilly) to offer "mini-shakes" for $1. Once I started driving, imagine what became my favorite destination
I just joined a new workout facility sponsored by a regional rehab center. In my evaluations, no one was too worried about my doing cardio in the near term. That will come. The trainer suggested I do the "arm bike," but it was lame. I do the stationary bike to work on ROM but so far have not used it for a true workout. I hope to start swimming soon; that will probably be my cardio once I get up to it. Right now when I kick my legs slowly sink...not strong enough.
You are determined enough that all of your biking, walking, cardio, etc. goals will return. Give yourself this time not to push. Part of the emotional/spiritual process of the TKR is about letting something other than flat-out willpower take some of the load of life. Stop and enjoy the Blue Bunny!
Sorry I got so long-winded. It's what happens at Bonesmart.
j