Hello, my name is eryn. I'm 19 years old, 125 pounds and 5'5". I am on a birth control pill, so usually my periods are light and short. My last period only lasted for 1 day and I am supposed to have my period now but I didn't get it. I am bleeding, but its extremely light and not like my normal periods. I have had unprotected sex, so I'm wondering if I should be worried about pregnancy.