I had been on Lamictal for about 6 weeks or so as I recall. And I developed a rash on my chest. (My pdoc never mentioned the concern over Lamictal rash. So I didn't know anything about it.) I went in to see my GP. He recognized it as potentially being caused by Lamictal & had me seen by a dermatologist right away. The dermatologist phoned my pdoc & took me off the Lamcital immediately. I know you wrote the rash you have is not Stevens-Johnson Syndrome. However the concern is that Lamcital rash can morph into Stevens-Johnson Syndrome. So it's nothing to mess around with. Please see your doctor.