cyclothymia

I have been on celexa 9 years varying low amounts, never felt great but thought I was ok. I thought I should check in with psychiatrist to make sure I was doing the right thing. She diagnosed me with cyclothymia. I have very few manic symptoms. Anxiety and the experience of racing thoughts. The thoughts lasting less than a minute each episodeand it only happened twice. I did take note of this as something new. My profile in the past has been that I moved from mild depression to feeling ok then to a week of anxiety.
The doctor thinks I have a mild case, but the diagnosis threw me for a loop. I am currently on 100 mg. of Lamictal, I don't feel depressed but I feel incredibly anxious. I am a strong and resourceful person most of the time. Has anyone had a similar experience? I hate feeling broken or out of control. Thanks Deb