Ttc journey please help

Monisha

I usually ovulate on 14th and 15th day of cycle...this time I kept tracking using opk never got a single peak but had good cm....so I thought I missed the surge ..did the deed on 13th, 14th and 15th day of cycle ..today is 17th day of cycle and today mornings opk is the darkest...now I am worried that I missed it yesterday night as it was light on op so we did not do it