Period delayed

Hello guys, hope you can give me an advice. My partner just arrived last 7th of September, he’s been deployed overseas for work. We had sex the moment he arrived. I check my calendar before having sex to see if I’m ovulating or not. Been delayed now for 12 days. We are scared now in case I get pregnant. 😭😭😭 been using Glow to guide us for 2 years now and I never missed my period and Glow never gets wrong in terms of calculating my ovulations and days of period. 😭😭 do you think I’m pregnant?