Fertility window

Sooo I'm suppose to be ovulating June 6th but as far as "textbook" to ovulating it says 11-16 days after my menstrual will be your most fertile time. Including Day 14 being the egg release. (This is basing off a 28 day cycle and normal circumstances). With that being said 14 days after menstrual would be June 11th not June 6th. I'm confused. I understand that every female is not the same and that I need to check my CM but which one should I really base it off of?