Hello and welcome to HealingWell and to the bipolar board. I really recommend you increase your dosage under the advisement of a doc. Lamictal can cause this rare but serious rash if not eased into gradually. I wouldn't even presume to tell you the dosages.
I do certainly understand how upsetting and frustrating it is to be handed a diagnosis of a chronic mood disorder. I understand why you would want to just live with it for as long as possible. I commend you for facing it after all these years though. I think you'll find that once you get the medications right, stability is much preferable to the swinging.
Co-Moderator, Bipolar Forum