Hi, what a nightmare. I am so sorry. Mine is away now for just a week and I am having a lot of anxiety. In the summer it will be 4 weeks and she is helping me look at ways of keeping safe. For example this time she has written me a letter that I will open next week when I would have gone to therapy. I also have lists of things that help in different situations. She understands how attached I am and how much I hate the attachment but she says if I stop fighting it , it won't last for ever. She always asks what I need and how I can get it when she is away. I am also very lucky in that if she can she encourages me to text or email her if things get really bad. She knows that I have never yet done this when she is on a break, but it helps me to have this safety net just in case of emergencies.
I think the voicemail thing is a brilliant idea. If she says no maybe discuss alternatives. It sounds like she is wary of patients becoming dependent, but for some of us it seems to be part of the therapy. If we didn't have attachment issues we probably wouldn't become dependent in the first place. I really hope you find a way of discussing this so she can help you prepare.