you might try lowering your dose. before kids, i took 40 mgs a day, and it made me really mean, so i lowered my dose to 30 mgs a day and things got better. now with kids, i'm back to 40 mgs a day, but i think i'm getting ready to lower my dose again!
also, as you are a woman, if you're taking birth control, make sure you look into that as well. some birth controls can really make you go nuts too. it's also something i've been through recently -- anyway, just another possibility.