Sore bladder?

I have been drinking tons and tons of water because I've been extremely thirsty. You know those 38.8 oz smart water bottles? I've had about 20 of those. And more from my kitchen sink lol 
I think i was dehydrated, I suffered with a headache all day yesterday that was horrid. But now I swear my bladder is sore. I'm not going to lie, I don't drink as much I'm supposed to, could that have anything to do with my bladder being sore? It hurts to pee, like not down below but in my lower gut.