No period yet post baby

Ximena
I had my daughter in November, so the 90 days post-partum of the <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Nurture</a> app are over now. But I am exclusively breastfeeding, so I haven't gotten my period back yet. How do I use Glow? How do I tell the app that I haven't gotten a period since I conceived a year ago?