So According to glow I was supposed to start my period March 30. Didn't show so I took a test and it was negative. So I checked my other <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> app and it says I was supposed to start Af April 1. Still no sign of Af and still getting bfns. I had a positive opk on March 18 which we bd every other day this cycle. How much longer should I wait to test again? Also had a mc in Dec and haven't had normal regulated periods since and this is my first positive opk since October 2015.