I took the morning after pill on October 26th, the day my boyfriend and I had sex. We then had protected sex on October 30th and November 2nd (Both times the condom did not tear/slip/break, and he pulled out before ejaculating).

Today is the 3rd of November, and I noticed some light brown/red blood. Is it possible it's my period?

How can I tell/know for certain that it's my period? Is it possible for my period to come a week earlier than usual after consuming the Morning After Pill? For more info, I'm 17. Don't give me c**p about having sex at a young age.