Squid
Here's an alternative theory. It may or may not have merit, but it may be something you should consider.
Do you wake up because you have to pee, or do you head for the head because you wake up?
As a sleep apnea sufferer, I can tell you that before I had my sleep study and started using my CPAP machine, I would wake up quite a few times during the night, and every time I woke up, I naturally had to head for the bathroom to take a leak. I wasn't waking up to pee...I was just waking up, and when we wake up after a couple of hours of sleep, it's natural to feel the urge to pee.
Now that the CPAP machine allows me to sleep well, and to reach the deep stages of sleep where the urge to urinate is put on hold, I get up once, or maybe not at all during the night. And it was that way even prior to surgery, when I had a much-enlarged prostate and a constant urge to pee during the daytime.
So, the alternate possibility is that you might have a sleep disorder that causes you to sleep lightly, so that you wake up frequently and then feel the need to pee. Ask your wife. Do you snore heavily? Do you hold your breath during sleep? Do you sometimes wake up gasping for air.
I just offer this as another possibility, and I suspect other diagnosed sleep apnea sufferers might agree that it's something to think about.
Also, how's your blood sugar, my R. N. wife asks.