I locked myself out of my car 3 times ( I have a habit of automatically locking the door before I close it). One of those times was during the funeral of my best friend's mother, & a line of cars were beihind me! I almost started a few fires b/c I forgot to add water to the coffee maker. So, yes, Lamictal really messed with my memory & word recall. I stopped taking it last year & I still have those problems to some to some extent- interesting to read that another poster was effected in the same way.
But I discontinued it b/c it was causing hypomania. The benefits may be worth the side effects for you. Please don't stop any medication without consulting with your Pdoc first.