First and most important, I would recommend as other have speaking to a professional. This will be beneficial for her in any regards. That being said generally speaking you are not doing her any favors by doing things for her and sheltering her. She won’t build confidence by not putting her self out there. She needs to put her self out there, the more she does and more she speaks to people more comfortable and confident she will get. I am not saying just push her out and let her fight for her self. But don’t jump every time she calls for you. She is using you as her crutches at the moment. So try to slowly push her to do things on her own. And start with small things. Calling your doctor she should be doing her self. Especially as medical professionals will most likely be professionals on the phone and will understand stuttering, so that call shouldn’t be traumatic. You can schedule the call with her, you can be next to her as support and hold her hand. But have her do the call. Same as visiting the doctor or stores. Be there as support, hold her hand. But have her speak for her self. Some “Tough Love” is good from time to time. I would recommend, again, to speak to the professional as well and maybe develop a plan and steps to follow with the professional. This way she should definitely feel supported even though you are pushing her out side her comfort zone.