In my opinion your on low doses of your meds.... I've never been on Lamictal however I've heard therapeutic dose is around 200mg? Also, if you tell your Pdoc you had good results with Seroquel (antipsychotic) in the am, then possibly he will increase it to keep your levels up throughout the day.

I'm on a mood stabilizer (tegretol), antipsychotic (seroquel), benzodiazipine (klonopin) and antidepressant (celexa)...