Hi I don't post so much but I thought I would to this because I have huge issues over t holidays. I'm glad you got some notice, thankfully mine always give me a few weeks to get my head around it.
She knows I struggle with it a lot so we chat about it and she tries to reassure me that she will be back and she will still be her! I still kinda feel abandoned though even though rationally I know that's not the case, and that everyone needs a break Now and again, so then I feel slight guilt that I go on about it etc.. most times she's let me email and has replied to me on the normal at day just to keep them connection going, because I tend to fear that I lose it!
I have a holiday myself coming up, well I say a holiday although it's kind of a prearranged agreement so I'm to miss a session.i let her know already but might she if she can play around with the dates with me a little so instead of 14 days it will be 10 which helps slot more I think.
As far as handling I just try to keep to thinking about day by day rather than the while block of seperation. Also look forward to email if she agrees to keep the connection etc, the struggle I do find myself having is my anxiety goes through the roof in the first session back and I take a little while to settle back down. Although normally by the End I've managed to ge reassured etc and then utball starts over again.
Sorry for lack of any advice but I just wanted to know you not alone, and from other posts I've read on the forum it's all very common