if all else fails try this....
Before going to bed state your intentions to your body, say something like....
"Dear Body of mine, i love you but your ruining my sleep...give me a wonderful nights sleep and i promise to nurture you during the day"
keep your promise and most importantly...love your body, its your temple. It's trying to get your attention...so be aware to what it wants to tell you. You own your body, it doesn't own you...
So start telling it what you want and leave the rest up to the body.
it probably just wants you to stop holding emotions in it ...so it acts up, or your putting something in it that it doesn't like and at night...while its cleansing itself....you get really thirsty or pee a lot...
anyways...only you know your body, no one else does...so ask it questions and then be still and quiet... to hear it's answers
Hope that eases the mind a little
Peace be with you