hello i have quite bad pain on my left side,between what feels like my pelvis and ribcage,roughly in the middle,and feel quite thirsty,but not sure if it s due to me stressing out or what. I woke up and needed to pee badly,but i don t think it caused any more pain. When i sit in certain positions the pain eases but does not completely go away. What do you think it could be,any advice would be great thank you very much