Mg codeine symptoms and conditions

My chronic pain has really increased since being on Lamictal for 15 months for bipolar. I have had fibromyalgia for years. The bipolar developed after that. Since starting Lamictal, I have developed headaches so severe that I have been off work 3 times in the past 7 months, inc. 5 weeks recently. I've always had headaches, but these new, more severe headaches are non-stop. I have to take 3 time-release 100 mg codeine tablets every day, plus Gravol to keep the headaches bearable. Even then, many days I end up bed-ridden. I've also developed chronic, very bad plantar facsiitis in my left foot since starting Lamictal. I did weeks of intensive physio, plus swimming therapy to no avail. Finally had to get a cortisone injection in my foot.

I hate being like this; I like my job and was used to leading a very active life, despite the fibromyalgia, before I went on Lamictal. I briefly tried Lithium recently, but it had a whole other set of side effects, so I am really frustrated.

Has anybody else had increased or new pain since being on Lamictal?

Rosslyn