Ovulation

I last took the depo injection Aug. 2015 since then since I've logged I've had 8 complete cycles 5 which have regulated to being a 28 cycle like before the injection (this is good) ... My problem is I'm not sure if I'm ovulating or not because I only have unprotected sex w. my SO & haven't gotten pregnant yet. I check CM & I never get egg white. I'm really not stressed or worried at this point I would just like to know any ways to get the egg white CM naturally