Metrorrhagia

Hi this is my first post on eve and i really need your help. I have a metrorrhagia ( vaginal bleeding between periods ) actualy its spotting not bleeding, no pain or any other symptoms(dizziness, fetigue or fever)    And it happens after ovulation. I am 21 year old sexually active and have only one partner, no pregnancy. If  anyone exparienced  same thing please comment any advise before I ago to the doctor.