What Causes Chronic Depression After Recovering From Flu?

Hi Dr - I had the flu last November. After I recovered, I noticed I was feeling depressed. I thought, no problem, it will go away as i get better. Well, it hasn t lifted, it s still with me. I fake it througout the days but it just remains. I try not to focus on it, taking up tasks, fixing things,...going for walks, etc. I also have a woozy feeling when I am still, like right now for instance. I have no wooziness when I drive or am moving around or in someone els s car. Can you give some insight on this? I ve read about the cytokines that chase the flu away, but are they causing the depression? Thank you for this website.......