Two week wait

Hallie

My period is due in 3 days. I had a positive ovulation test 11-12 days ago (which is when I always ovulate) BFN HPT this morning, but positive ovulation strip. I have a very regular 28 day period. Last time I was pregnant I had a positive ovulation test , but my test was negative this morning. Thoughts ? Is there an LH surge like this before a period ?