Sometimes (like today) I wake up in the middle of the night to go to the toilet, but will be unable to sleep after. If I wake up at 4 or 5 am I usually just continue with my usual routine of exercising at 630, but today I woke up at 230 and couldn’t sleep since because of an ache near my right hip and tautness in the right foot (maybe sciatica?). I don’t feel particularly tired, but I sense I’ll probably get a headache in the afternoon regardless of whether I manage to sleep again (usually happens after a night with interrupted sleep)