Help ?!

Brittany • Christian Mother , & wife ,baby number two Due march 27th??
Okay so I looked at my period log and it said my fertile window started Saturday (a day after AF ) I had O pains Sunday .. But a temp spike yesterday . (I think) i don't check bbt all the time depending on if I had to get up to get the baby during the night or not . But checked again this morning and it was Lower . I haven't been using opks seeing as how I'm only 8dpo? My periods are irregular right now . So idk when to start using opks . But I haven't really had any cm . Just a little spot tonight in my panties . We've had sex everyday since the day after my period . So that won't be an issue . But i don't know what to think ..