Started St. Johns Wart

Well I went to the organic food store and I bought some St Johns Wart a few days ago and I am already starting to see some possitive effects. I know it takes a few weeks to work, but for the first time in almost a year I laughed like I used to when I wasnt so sad, and I felt for a brief moment like myself agian. My moods keep swinging up and down latley. Sometimes I talk myself into a great mood(but this is rarley)  and I feel like everything is fablous, and then I snap out of it and remind myself of my reality that infact things are not fablous and have not been for a long time, and get more depressed. Sigh. Well atleast I got those few moments of joy!!!  This happens alot latley, it is almost similar to the symptoms of bi-polar but not exactly the same as the symptoms that I have read about. Could I have Bi-polar???? It is something I have been thinking abouit alot latley and I ordered a book about it from amazon.com.