This reminds me of my dad's last days - over a month in the hospital with heart problems. He always was of the "never show pain cuz I'm a MARINE" persuasion, so he would outright lie whenever he was asked about pain he was having unless I was the only one in the room. The nurses figured out very quickly that, anytime he told them he wasn't in pain, to snag me the next time I left the room to get the real story, as he would generally tell then that his pain was "oh only a 3, I can deal with it" on the 1-10 scale to a nurse (or doctor!), wait for them to leave, and then grab his back/leg/arm (nasty bedsores from an inflatable mattress that was left *uninflated* for THREE WEEKS on his hospital bed

, surgery pain, and constant pain from the IV's, respectively) while visibly crying at the intensity of the pain when only I could see. I usually managed to calm him down and make an excuse (refill his water jug, etc) to go see them whenever he did that. I loved him to death but he didn't know when to just sit back and let the hospital peeps do their jobs >_>
As for me...? HBP, thyroid, weight....And all meds with exact doses AND what they are for in civilian terms listed in a little pocket-sized Moleskine I used to use as a food journal; I try to keep it in my briefcase or whatever.
Trust me, whenever I inevitably end up in a hospital at some point (just like just about everyone will, sooner or later), it is my intention to be very clear about anything that needs attention...without being a dick about it ^_^