Period...

Nicole
OK so on my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> it says I was supposed to start 3 days ago and I didn't but when I was logging my info in it didn't give me an option to log that I haven't started. Anyone know what to do to log that u did not start?? Also going to take a test..wish me luck!!