You are describing common side effects of lamictal, and you may have escalated your dose too quickly. Lamictal is one of those drugs that really has to be increased slowly, to avoid some potentially serious adverse effects.

I can't tell what dose regime you were on, just from your description of a "dose pack", but here is the recommended dose schedule:

25 mg daily for two weeks
50 mg daily in weeks 3 and 4
100 mg daily in week five
200 mg daily, in divided doses, week 6

If that last dose increases increases side effects, then going to 150 for a week can smooth the transition up to the usual target of 200 mg.

See: Table 13, http://www.rxlist.com/cgi/generic/lamotrigine_ids.htm

Lar