Oh gosh I was so afraid of this. I have severe anxiety and my gastro told me this morning he wants me to have a colonoscopy done and Im having it next Monday. I told him I was afraid and scared of the prep what if it doesnt work? He is so nice but I am absolutly petrified, to the point that I literally feel sick. I took a xanax to help calm me down but I feel like I am in a panic attack that wont stop. Please tell me all about a colonoscopy does it hurt? Will the prep work for me? He told me I will be in a twilight sleep he said its like I will be asleep but not totally asleep. I know I am probably going over board but I am absolutly terrified and to make it worse the morning of the procedure I cant take any medication which means I cant take a xanax...Please tell me what you can thanks