last year i use to have irregular periods it use to come every other month so i took birth control to regulate my period and dis year it came in the beginning of jun july and august and they ranged from 5-6 days and in august it only lasted 3 and it was on and off it is now september 17 and i havent seen af yet i have period pains like its going to come on and a week ago my nipples were sore for a whole week could i be pregnant im so scared because i cant afford a baby im only 18 years old