I had severe headaches both times I started Lamictal. My memory is that they went away after a while. I didn't have migraines at the time but looking back they were probably migraines. I even had auras with them. Now I have migraines but I have no idea if they are med related. They seemed more hormonal as I went through menopause and did decrease after that process but I still have a few a month without a known cause.

Have you tried magnesium? It massively decreased the number I was having when I started it (started at 400 mg, now take 1000 mg daily).