Lamictal Headache Q?

I have started Lamictal about two months ago, and titrated it as I should with the help of a psychiatrist. Only now, at 100 mgs, have I gotten a stubborn daily headache. It's been ten days. I had read that if you do get the infamous Lamictal headache, it goes away after a couple of days, four days at most. Non-prescription pain killers are not working anyway. I am finding that I have to take either narcotics, or migraine medicine (a tryptan), or just Valium to sleep it away. None of this is recommended. I do take Inderal as a migraine prophylactic, and it had been working. Is this going to go away? Or should I go back to 75 mgs, where I had had a headache for the first three days only, then none for what remained of the two weeks at that dose. Lithium is not an option for me, because I developed a nodule on my thyroid, and Hypothyroidism, and Hashimoto, when on it, and am now taking Synthroid.