Ovulation

I took this positive ovulation test the 9th and this morning (11th) I took another which is obviously no where near positive. Does this mean by the looks of the test I ovulated the 9th or the 10th? I had sex the day of the positive test but didn't the day after and now I'm worried.. Also when having the positive test I had a low and open cervix it's now high, hard and I think shut? Any ideas?