Yes. Keep a mood journal. faithfully. It will be very important for you and for any provider to see patterns.

I absolutely agree with pumpernickel re: fasting and mood changes. This can be a huge factor in mood/moodswings. This can be so potent a mood changer for some people. Many spiritual groups use fasting as a part of their "formula" to reach a state of bliss. (These same spiritual groups will eat root vegetables to ground themselves.) If you truly want to know about your moods and your possible diagnosis, try to keep you diet within the same guidelines every day. Food does have an influence.

Listen up to Christina and Gabyunbound. You would otherwise pay hundreds of dollars, or more, to gain that much advice/ direction.

hope to hear more from you. Keep on keeping on!