> getting up twice a night to take a piss
Highlighting this for a quick PSA: this is not normal. People (at least Americans) seem very eager to dismiss this as a thing that just happens for no particular reason, or because you dared to have a small glass of water within 4 hours of going to bed. It's not highly specific to any condition, but it points to an abnormality in some physiological process [1]. It can be anything from lifestyle factors (e.g. high caffeine or alcohol use, or unusually high sensitivity to them) to chronic disorders, to having no identifiable cause. For me it was sleep apnea.