I looked at her pasted post on her timeline of taking meds but didn't see much else. Do we know if it worked? Did anyone know her?
Online I found one article about a handful of suicides with N in Canada but nothing in the states other than a guy who told his mom right after and was saved.
I think when a person does a goodbye thread, if there wasn't anyone to report afterwards, hers was as detailed as it can be. The way she was feeling, acting, util to the last moment when she took the N, she even posted a picture of it.
As for what she felt afterwards there is no way to know, but since she never posted anything ever again and reading all her other posts prior to the event I would assume she is at peace now.