Why would I be spotting 2weeks after period?

Vanessa • After TTC after 1yr & a half....baby girl is due October 2015
Me and my husband TTC I have been tracking for several days to see when ovulation would occur...then I started spotting almost like starting a period all over again. I am supposed to be ovulating the end of this week according to the Glow calendar but I'm not too sure that's going to happen. So upset considering I feel I am just not able to get pregnant.