I am more tired than I thought

Continuing the weekend working scheduled since I came back to Amsterdam in early September, I found that I was really burned. I couldn't sleep well at night and weak up late in the morning. Coming back from work this afternoon, I felt dizzy and headache and rolled to the bed and passed out for 4 hours on Saturday afternoon. Ah, very much needed rest, it is the raining season in Amsterdam, I cannot go rollerblading...