Spotting

Hey everyone so I have had midcycle spotting for the last almost two years around ovulation time! It is really light but is there usually before I ovulate each month! This has happened since January of 2013 when I stopped taking birth control! We are trying for our fourth baby which hasn't happened yet! So was just wondering if this is just from ovulating or if I need to go to the doctor and have my hormones checked! What does everyone else think? Thanks