What Are The Symptoms Of Pregnancy?

hi my name is cabrea and just last week on Monday I went to the restroom and found a spot of blood on my underwear and thought I started my period. I checked on it later in the day and there wasn t anything on my pad. the next day it looked like I had a brownish discharge. it has never happened to me before. I am 17 years old and I don t use birth control or protecting. could I be pregnant?