BBT Confusion?!?!

Britney • Isaiah William 9/9/15! ♡♡
Okay ladies, opks led me to believe I ovulated on the 7th or 8th due to positive opks on both of those days.. I just got FF today and put in all my info and now I'm confused if I BD'd at the wrong time or what is going on. I'm on CD29 right now and my cycle is anywhere between 28-30 days