OPK help please!

Hi! I have been off the pill/TTC for 5 months. AF within 30-32 days each cycle so far. Last cycle, digital OPK+ was on CD 14. This month, I have also been using strips . I have used strips since CD 12 and digital since CD14. I am currently on CD18. Strips are confusing me and all look the same & my digitals are all negative so far. Also, My temps have all been in the 97.2-97.5 range however today was 97.7. No OPK+ this yet this month. What is going on? Did I miss it and I started testing too late or is my OPK going to be really late this cycle? Also, why do my strips all look so similiar? I thought they were supposed to be really light when you aren't in high fertility zone... Any help would be appreciated :)