It can be tough to work through this.
I am on my second trial of Lamictal, still just increasing doses.
My first trial, several years ago, did not go well. I'd had a severe rash/crusting of my scalp, which the dermatologist had thought was caused by Lamictal.
I have decided to try it again, cautiously. I have been treatment-resistant. Lamictal helps so many people, I am hoping I can tolerate it this time and am also hoping I will find it helpful.
For me, the potential bad from Lamictal does not outweigh the potential good.
While I do understand your mom's concerns for you, I think she probably does not have access to more balanced information. If all I had was the medical info with the SJS warning, I might think the med was not worth a trial, or two.
You are hearing this from someone whose aunt had a severe SJS reaction to a very different med.
I hope your anxiety calms down right away.

WC