If the discharge is clear or white and has no odor, than it is completely normal. Vagina's are sefl-cleaning, so the discharge is just an excretion from your body. If it has an odor to it(fishy smell) or is of another color, than make a doctors appointment..
First off, it's normal. From what I understand it's mucos ( kinda sorta like the stuff in your nose but not). For some people it changes colour thickness etc during the time of ovulation (where an ovary releases an egg) but it is totally normal as long as it is clear-white and has no odour