Dysthymic phase
Difficulty making decisions; problems concentrating; poor memory recall; guilt; self-criticism; low self-esteem; pessimism; self-destructive thinking; continuously feeling sad; apathy; hopelessness; helplessness; irritability; quick temper; lack of motivation; social withdrawal; appetite change; lack of sexual desire; self-neglect; fatigue or insomnia
Euphoric phase
Unusually good mood or cheerfulness (euphoria); Extreme optimism; Inflated self-esteem; Poor judgment; Rapid speech; Racing thoughts; Aggressive or hostile behavior; Being inconsiderate of others; Agitation; Increased physical activity; Risky behavior; Spending sprees; Increased drive to perform or achieve goals; Increased sexual drive; Decreased need for sleep; Tendency to be easily distracted; Inability to concentrate [/I][/FONT]."

So because of this;
You think you have cyclothymia because you've noticed a lot of the above symptoms as the seasons change.

I have been diagnosed Cyclothymic. Trust me when I say you need to read this article, then go and see a doctor if you still believe you are Cyclothymic.

I honestly believe from my own experiences that you are more likely to be affected by SADs. (click link above)