Have you tried explaining to her that you were looking for a good fit in another job, but just couldn’t find it in your current location? That you want to go back to the train job, not because you like it or you want to move, but simply because you feel like you’re letting her down and you don’t want to let her down anymore? I ask because it sounds as though she feels you’re just being fickle, and doesn’t understand your intention in all this.
This article may help you with communicating with her better:
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism