Colonoscopy

Hi every one I’m due for a colonoscopy on Tuesday I’m feeling really scared don’t really feel.upto the procedure as I really suffer with stress and anxiety but I know I need to do this  I have been feeling as if I need to poo but some times it’s just reddish pus and feeling very gassy but because of feeling I need to poo I’m always in the bathroom , been having problems for a while now. I thought maybe I just had internal piles but when I went to my gp doctor couldn’t see or feel any thing so did a fit test which came back positive  so I was referred for a colonoscopy  I’m so scared of having cancer  not looking forward to the bowel prep  I think your all a lot braver than me   Xx