Was this a forewarning?

Looking back, from about August 2010 I was unwell. I had a series of sinus problems which gave me some worrying dizzy spells, and after this I felt under the weather. At lunchtimes I would walk to one of 2 parks near to the office, and sit in the fresh air, which seemed to help clear my sinuses.
I felt a bit down at these times as though my life had somehow changed.

Looking back I wonder if these dizzy spells were the results of TIAs... little did I know at the time what was waiting for me in a couple of months!