Abnormally strong bladder

It was recently brought to my attention by a friend during a vacation that I was rarely going to the bathroom, yet drinking a lot of liquids. I do not feel the need to go to the bathroom unless I really have to go and my bladder is very full. I easily get dehydrated, which I attribute to my spastic muscles, and so i drink maybe 70+ ounces of water throughout the day.

Is anyone else experiencing this? I am now a little concerned that maybe I am unknowingly harming my bladder due to any sensation or contraction that I may not be feeling. I have done some research online, and I only see the opposite, incontinence, as a condition associated with CP. I can spend the day out without using the bathroom, while all my female friends are going to the bathroom 2 or 3 times in that timeframe.

I have mild spastic hemiplegia. Also, I have always thought that because I learned to go to the toilet when I was one but didn't learn to walk until I was about 4, maybe because I had to wait for someone to take me for 3 years of my life I developed this strong bladder.