I was in your shoes earlier this year. My T was going out of town for two weeks, and I was freaking out. I bit the bullet though, and told her how I was feeling and how anxious and scared I was to be without her for 2 whole weeks. She was wonderful! She helped me process the "whys" of it all (I have a lot of trouble with attachment) and said it is perfectly natural. It really helped me a lot, just talking to her about it, because it took the secrecy out of it, and it took the pressure off of me to be so strong about everything. It was actually quite a turning point in our work together!