I'm ill :(

Yesterday I was off sick from work after waking hot, dizzy & sick, but gradually I felt ok apart from a Headache.
BAM! It hit me again today; woke up cold & o so tired after 11 hours sleep,
 I slept on & off all day, more asleep than awake.
I drank water when I was awake, I didn't have a Temperature, so this was my view each time I woke up.
I went to sleep at 8.40pm & woke on the 20th at 6.50am.
Sleep so I've always been told is the best cure.