Where is my period?!

Waiting to try again is the longest wait but it's worse when your period never comes. Last period was Dec 27th ended by the 1st. Took ovulation tests 2 days before Glow told me to) with no positive out of 11 tests. I ran out of tests so I surrendered. Well by recording the test results Glow kept jumping my "peak fertility" everytime I posted a negative result and so my period due date changed too. I was "supposed" to start on the 2nd and still nothing. Took a pregnancy test to be sure and it was a BFN. So what the heck? This is our 3rd month of using ovulation tests and I have only had one positive result (back in December) and 5 months of trying. This is getting fustrating! :(