Late ovulation

Hey ladies! I have the Ava bracelet. That and the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> predicted my ovulation date for April 13th. I have yet to get a positive ovulation test and ava has said I didn't ovulate the last 2 days, so keep trying. Anyone have this happen? I an getting so frustrated and nervous they ovulation won't happen and I'm out already this month. So discouraging. I just want my BFP!