depo injection and ttc

I've been off the depo injection and been TTC for 4 months. My periods are back and I'm supposed to be ovulating today. My period was on the 12th and lasted for 9 heavy days, it's day 15 after start of my period. There isn't much CM only if I check internally, it's watery, yesterday it was white and thick with tinge of blood. Please help you have any advise of I could be ovulating