I experienced light-headedness when going to sleep (3 time a day, for 2 hours, and I trained 45 minutes rest too at the time, so quite often). I could have felt

I experienced light-headedness when going to sleep (3 time a day, for 2 hours, and I trained 45 minutes rest too at the time, so quite often). I could have felt something was wrong. But truly, I had to get a physical check to get my sport license (it's mandatory and free in my country), and I had a new doctor who really checked me, told me about it and to stop intensive efforts, weird sleep patterns and keep doing endurance sport. Sadly I forgot about the last part after a while.