I'm 31 and TTC my second child. This is my first month using glow and bbt, cm check and OPK together. On my bbt, I got a spike yesterday, which should mean I O'd the day before. But then on my OPK, I didn't get a positive until yesterday. And I still haven't gotten EWCM. Glow says I should ovulate today. Which one should I go by? They're all different!! Help please!! Thanks!!