Opk and ovulation

Hello ladies!

I have a question about my opk and ovulation. I got my peak yesterday afternoon, but I am still getting high readings. I know the LH surge can last for 24 hours but I was wondering if this meant I ovulated yesterday, today or tomorrow?

I am also trying my hand at bbt temping but i wont know till after ovulation with that. (Plus not 100% my bbt thermometer works correctly. My temp this morning was 96.72 which seems low but it is my first cycle temping)

We have been trying for several months and I want to make sure and get the timing tight. I have never had a LH surge this long so I am taking that as a good thing.

I really appreciate you reading and responding. Any information, opinions or advice is all greatly appreciated.