Positive OPK 6 days before AF..

Bronwyn
Hey Ladies,
Just need some advice.. 
Took an OPK 8 days after i assumed i ovulated as i have a super regular period of every 26days and i got a positive.. 
My husband works away so we dtd the whole week he was back which was the week i was suppose to ovulate..
But since i got a positive opk does this mean i didnt ovulate then and im ovulating now this late? 
If so ive totally missed my window this month as hubby is away again :(