I had an exhausting week and went to bed at 9pm as I couldn't keep my eyes open. No plans today. Yet here I am wide awake at 5am. I know our sleep changes as we get older, I previously had quite a long thread about waking up at 4am (turned out to be due to stress!) but is that now it for lay ins? Will I never be able to sleep like my 20s and 30s again?