On the eve's eve's eve of my trip

I leave for Italy in two days - TWO DAYS! I had been incredibly excited about it, but today I'm suddenly choked by anxiety. I have the packing list. I've checked it twice. I know what I need. I've done trips like this before. This is my second visit to Europe. It has been a long, hard year, and I am ready for it be over. I am to the point that I have given and given and feel that I have nothing left to give. I just need to regain control of my life because I feel like it has been so out of control lately. I know I will write more about Italy, but for now, I'm concerned about trying exchanging money, packing, and letting it all sink in that I will be on an amazing trip with one of my closest friends soon.