am i pregnant???

I'm 17 years old and before this year I hadn't so much as kissed a boy, but last week I lost my virginity. I know to most that may seem fast, but I recently started a new life and I see it as making up for lost time. Last week when I had sex we were making out and then things escalated. For a while we weren't actually having sex yet but we were naked and I think I felt him precum. When we did finally have sex, he used a condom. I should also mention that I'm on my second month of birth control. I didn't think much about it, and this might seem crazy, but my aunt is a little psychic about pregnant women. She always knows when someone is pregnant and when I got home my phone was in my front pocket, making my shirt bulge out and she asked if I was expecting, which suddenly make me very nervous. My breasts have been getting firmer and more tender, and today I have been a little nauseous. My cycle is normally around 32 days and I had sex on the tenth day. I am really freaking out, as I am not ready for a child and if anyone could send me your advice, thoughts, or similar stories that would really ease my anxiety. Thank you