I know what you mean, Amazonmom, and welcome back! Not that you've been gone long, but I did miss your postings.
I fear I'll be put on Lithium too if Lamictal doesn't stabilize me soon.
But I have the reverse problem. I seem to be high in the morning and evening and have a lull around 2-4 or 5 in the afternoon. When I was depressed, I felt bad in the morning, though.
Onlyme, definitely talk about your change with your dr. Sorry if I'm repeating myself.