Can lamictal cause mood swings?

[Bob]

I'm 15 and have had problems with mood swings in the past. I have been taking Lithium for a little over a year and it has worked fine. A few months ago I started Lamictal with plans of getting off the Lithium. I am now at 50mg of Lamictal and need to get up to 200mg before I can get off my Lithium. Today I had a great day but when I came home to my dad's house my dad said something that really hurt me and I was planning to see my friend but then I called her and said I didn't want to see her and that she didn't matter to me and other mean things. That is not like me at all! Even at my worst I would never hurt my friends. The second I hung up the phone I realized I was wrong and it was like a terrible mood swing that lasted for not even 5 minutes! It was weird and I was just wondering if that could have something to do with being on the lamictal. Could it change as I got more adjusted to the Lamicatal? Could it have to do with being on the Lamictal and Lithium together?