Boy do I know exactly how you feel. I once had a coworker who laughed constantly throughout the day and it was like finger nails on a chalk board. I also am on lamotrigine 200 mg and felt more annoyed with people for the first couple weeks, then I felt completely flat and emotionless. Finally, I feel like my baseline mood, people still annoy me but not nearly as much. I still feel numb regarding my feelings towards my family members, but that is good, because they have said and done some pretty painful things to me recently, and I feel like my heart is on novacaine. I really feel very little.

I know that what you describe is fairly common when starting lamotrigine, for me it was, but I do feel better and more stable. No more falling in love at the blink of an eye
(funny because I have almost no sex drive--LOL) and no more moving across country just because it sounds really fun. I still have the same thoughts, but not the feelings underneath driving them. I do not know if this makes sense or not.

I hope you feel better and know that you are not alone in this. It just takes time to get the meds right.