I agree with Kaliope, an increase in Lamictal and/or addition of and anti-psychotic may help you. AP's are really good at helping with agitation and irritability. Lamictal is more for depression and mood stability.

There was a time when I was called 'treatment resistant' but now I am finally making progress with the right diagnosis and pdoc (some say you are treatment-resistant because they cannot do their job properly). 2.5 years into treatment is not that long so don't be discouraged, there is hope for you. Hang in there.