Yesterday I had to get up at 6am, (having gone to sleep at about 11pm the night before) but I felt tired all day. I had a very unproductive day, never really got going. I ended up going to bed at 7.30pm and was fast asleep by 8. I woke up twice (phone call at 9.30, toilet at 2.30 am) but went straight back to sleep after. Woke up at 7.45 this morning. I've felt a bit tired all today too, so a second unproductive day.
This is the third time in about the last month this has happened.
Why I am I crashing and having a 12 hour sleep? I'm 51, periods were irregular last year, but oddly enough have been regular so far this year.