Thesis Nightmares

I'm beginning to have some doubts, anxiety and fear about completing my thesis. I'm actually questioning if I should even continue to go forward with it or if I should just switch to capstone in the fall. I saw some thesis examples in Dr. Greenberg's office and I immediately became intimidated. They were all leather-bound and professional. It seems like I'm so far away from the finished product and that I might never reach it. And now, I don't know how I'm going to defend my thesis in front of my professors, I don't think I can. I'm terrible at public speaking and I hear that our arguments will be open for anyone to come and watch. I am very passionate about my topic but I'm not sure it will be enough in the end. I've been trying to think of who I would want on my committee but I haven't met many of the staff because I wasn't a comm major in undergrad. I have only really met Steve, Dr. Greenberg, Perry and Guinn. I only have just recently met Dr. Fitzgerald and I was told that we should choose professors who know us and who care about our topic. I would ideally love to have Steve on my committee because I've had the majority of my classes with him BUT we all know that won't happen as he is on sabbatical leave and all. So I think I would like to have Dr. Greenberg, because she is my advisor and knows me, and Dr. Fitzgerald because in getting to know her so far I really like her and think she might be interested in my topic because of her love of film and because she is a woman. My third choice is stuck between Perry and Guinn. I loved Perry's class that I took with him because I learned so much! I didn't like my class with Guinn but he seems like a cool guy. I guess I'll just have to figure it out and decide some time soon. Until then prayer will be my main focus and strategy on helping through this.