Confused...NEED ADVICE

Monica
My AF was on 9/21-9/24...According to Glow I was suppose to ovulate on Sunday the 5th...But I took a opk and according to it I was ovulating on the 2nd...decided to test on the 3rd and was still dark but not as dark...I don't know I'm so confused not sure of how many dpo..according to Glow my AF suppose to start on the 19th....