BFN And almost a month late?!?

Mary
Normally, my periods are almost exactly 30 days apart. My husband and I have been trying for baby #2 since April with no success. But now I'm almost a month late (last AF was August 9th) and I've taken atleast 10 tests and they have all been BFN! I know I ovulated in September Bc I did ovulation tests this time and got a positive LH surge. We are so confused!