Ovulation stick confusion HELP!!!

Terri • My name is terri Im from Essex uk, ttc baby no 3 for 2 years and have pcos
Please can someone help me as I'm totally confused. I was sure I had surge on the 6th 3rd pink test after the green one an had what I thought was ovulation cramps on the eve on 7th and ov test got lighter so assumed I was correct... only the tests r getting darker again :-/ please help me understand this lol. Today I'm experiencing cramping.... could I be ovulating this much later after lh surge. Xx