Thanks for your answer, bizi. Sorry for disappearing -- RL got hectic and I didn't get any PC time in. Your answer did help clarify, and it turns out that my line of reasoning doesn't really apply.

How have you been doing? (Has it really been a week already?! Yikes.) If the Lamictal increase is still under consideration, here's a thought-- you could ask her if you could start with an increase of 50 mg (or even 25 mg) to start instead of the full 100. I've been on it for years too, but my dose gets changed from time to time, ranging between 200-400 mg, adjusted in 50 mg increments. 100 is a pretty big jump and that sure can't help your apprehension about it, especially as it's never been changed before(!) Can't see why she'd be averse to such an approach.