Please help!! I'm not sure when I might have ovulated. Opinions please!

1st, sorry if this is the wrong place to post this.

I'm 31 and TTC for 9mos. I took my 3rd round of Clomid 100mg Cd3-7 this cycle. I had what I thought was a positive OPK on Cd26, but my BBT didn't start rising until days later. I'm really confused as to when I might have ovulated. I added pics of the "positive" OPK and my BBT charts for my last 2 cycles. Any advice is greatly appreciated. TIA

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