I agree with Doodle cant rep though. Its a very fine line and depends on her and the closeness of your relationship. They are thoughtful but agree the plasters are an odd choice because of the self harm link. I wouldnt think they were offensive, but be careful as they might be awkward so doodles idea was insightful. Its important you have a good insight into her actual anxiety and how it works, then you could find something practical thoughtful but a bit more on point imo. It was a nice thought though with the best of intentions.