Her symptoms sound kind of like what I had happen when I was in a car accident it was partly mental and partly physical. The seat belt hit my neck hard and damaged the nerves and it caused realy bad spasming wich got better over the course of a couple years. The spasms mixed with the mental trauma of the time, id lost my best friend less then a month before and some paranoia hit hard with the whole near death experience. My considerably minor stutter that only got me once and a while when my stress and anxiety were up became constant and the only time it wasn't thier was then I was out of my mind on musle relaxers they had given me. (later found out my dosage was wrong since the hospital didn't have it in my chart that I was highly sensitive to almost anything with a sedative quality) it took about a year to get my stutter back under control tbh I kind of forget about it since everyone kind of ignored the stuttering though I think the gash on my neck helped since it gave a visual reason for my stutter. Still pissed off that accident took my abitily to wear chokers away I love choker necklaces and even after the gash healed it would give my anxiety to have anything near my neck. Sorry for the tangents