the only way you will know is if you test!
If you have had unprotected sex then you might be pregnant. Test to find out.
Take a test with first morning urine. If you're having unprotected sex, pregnancy is always possible.
It is possible. You would absolutely get an accurate result on a pregnancy test right now! If it is negative then I would make a doc appt. Its never too early to start taking a multivitamin prenatal pill.