Still trying to move forward?

Okay, the presentation is next week and I am getting better at working on it. Not sure why I cannot seem to get in gear for this. This is the end of a long road for me and I should be motivated and excited, guess what, I'm not. Not sure why. I am not used to this, I am really good at moving forward, but this is too much for me. I am still going to do this and I know there is something in me that will make this happen. How I am not sure, but I know that I have it in me to do this, so I will just do it. Does anyone else ever feel like they cannot move forward?