Lamictal responses?

Hi- I've had dysthymia all my life. The only thing that has really worked is low dose lamictal (55 mg). It gives me a nice boost-kind of caffeinated, but much better than coffee in an anti-depressant way. Lasts about 5 hours. Unfortunately then it fades. As soon as I sleep, I'm back to square one. It's been a life saver. Anyone else have an experience like this? Most people don't seem to have this reaction, but might be worth a try...