Ovulating and irregular period

Nurulasy • TTC and needs lots of hope and faith and a little bit of baby dust!
Hey ladies, I need help. I am 26 and TTC for #1. I have been trying since May 2014. Well,  AF is suppose to come this 17th and I'm already at 5 days late (this is according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> app). I took a PTK after I was 3 days late for my period and it was BFN. I kept logging my details on my <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> on my late period and according to Glow i am at DPO 12. Should I take another PTK just to be sure? And will I be ovulating if my AF still don't show up? Baby dust to all TTC ladies! ✨✨✨??