Welcome eicanfly;I have BP II, so I can't comment on the amnesia thing with BP I, but from what I have read it can definitely happen. I think it's also good to give oneself time after a major episode to recover because we have had the rug pulled out from underneath us. I started a thread about this about a week ago.

If you haven't spoken to your p-doc already you may want to discuss a different mood stabilizer or an add-on for the lamictal. I'm on lamictal and an anti-d (wellbutrin), but I suffer from major depression way more often than the highs. Lamictal is good for controlling the lows, but not so good for the highs and add an anti-d to that especially a SSRI (wellbutrin isn't a SSRI) and that may explain the issues. Just a thought to discuss with your p-doc.