eve say I missed my period by 7 days but my boobs & stomach hurts still no PERIOD could I be pregnant?

Anita
<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says I missed my period by 7 days but my stomach has been hurting and my boobs are a little achy I'm so worried and said I will wait until next week to get a test to see if I get my period what do you guys think it could be?