Dry cm during early pregnancy

lyss

I recently found out that I’m pregnant however my cm is dry this time of month. I’m due to start today or tomorrow (glow and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> are telling me different days) I’m a little worried what this might mean, or if any of you have had zero cm but still had a successful pregnancy? This would be out first child.