Danielle, depending on how long your cycles are, it could just be bleeding during ovulation, First reason is possibly that when the egg bursts through the follicle, a little bleeding may occur. This blood will then make its way out and show up as spotting. Or, during ovulation, the level of estrogens rise, and this sometimes prompts the uterus to shed a bit of lining, which shows up in the form of spotting. - if this is the case then I would BD like crazy right around now (if you havent already been)

Its not likely that you are pregnant, but during this TTC Journey I have learnt almost anything is possible! HTH