I've recently had to be catheterized for an unknown amount of time and I went in Monday morning for my first catheter. My question is the catheter is very uncomfortable, almost like it may be to big. Is that a possibility? After searching the internet I see that there are many different sizes. The dr. that put the catheter in used a catheter that has a number 26fr on it. Does this seem too big or is that generally what is used?