Getting old

Think i am really getting old already. Today is my 4th day back at work and i am already having a headache and feeling very tired. Me still at my client's office. Decide to take a break thus updating my blog. Its only 9+ now and i cant concentrate on reading the docs anymore...the words are swimming right in front of my eyes and i am tired...hai...this is going to be a loooonnnggg peak.