If it's bothering you, it's reason enough to go. Do you have any other symptoms with the mucus? Sneezing, dry nose/crusting, itchy eyes
, watery eyes, etc. Do you notice that you have the excess mucus only at a particular time? (ie: being around an animal, being outside, weather changes, being inside, after cleaning, after being around someone smoking, after eating something in particular...etc) All of these things may help your doctor in determining the cause!
Best of luck!