Could I be pregnant ?

I have a very normal period . It comes every month at the same time , give or take 1 or 2 days . My period was scheduled to come on the 13th but nothing has came . I usually know when it’s coming because the smell & consistency of my CM . But this month it’s different , more of a milky consistency . Should I wait til my period is a week late or should I take a test this weekend ? I’ve been getting nauseous from the smell of in & out . The idea of eating a cheeseburger makes me nauseous . My nipples are sore throughout the day & I’m more tired than usual