That's rough, lostconf.

It's probably a good thing if you can keep somewhat busy to help deal with the thoughts. It might be helpful to write your thoughts in a journal, on the computer, or by hand. Also, maybe you can try to think of the break not as a two-week break, but just think of the time that will pass until you would normally see your T, and after that, of the time that would pass until you'd see T next time... for me, that helps make it more manageable. Maybe these suggestions don't sound helpful at all, in which case, just ignore them.
Talk to your T about it, too. Maybe there's something he or she can do to help you get through the break.
Most of all, hugs, and know that you will get through these weeks. I know it feels like an eternity but you
will get to the other side of this.