When to take a pregnancy test.

Lacee
Been TTC for 7 months. My <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> says I should have seen AF Monday, I didn't start. Glow pushed it back to today 7/22, didn't start! I dont want to get my hopes up. My boobs are hurting way more than normal and are super sensitive but I am having some slight cramps... Help