Could i be pregnant?

So i'm supposed to get my period today and i'm always on time but i havent. I have felt as if im on my period since thursday, all the same symptoms but no flow. I have bloating cravings, cramps, and migraines which i only get on my period. My S/O and i had sex on the 9th and the 11th. I was ovulating on the 9th but we always use condoms. I'm freaking out because i'm only in grade 12. I'm turning eighteen this year but i'm still too young.