I got up feeling fine on Wednesday, a little tired as usual. Got on with some work that I wanted to do and after a couple of hours, just fell asleep again while in the middle of it. Normally when coming off nights this may not be too unusual but I fell asleep for about another 6 hours.
This pattern then continued for the next couple of days. Me waking up, managing to stay awake for about 1-2 hours, then falling asleep again for 6-8 hours. So in the past 3 days, I've been awake for about 10 hours in total. I just could not stop feeling tired at all.
Today however I have got up and I feel a lot better. The feeling of tiredness has gone and hopefully this means I am back to normal. Felt pretty strange to me as apart from the tiredness, I had no other ill feelings at all.
Maybe it was the Equinox that fizzybean was on about.