Pregnant or not

Hello mga mommies Jan 29 to 31 menstruation ko then after that nagtake na ako pills, pero feb 4 ng loving loving kmi ni mister using withdrawal method, then feb 6 to 7 ,ng spotting ako, (its my 1stime) 6 days after ng regla ko, is it sign of pregnancy? Or dahil lng dun sa pgtake ko ng pills yun? By the way Last po ako ng ngtake ng pills is 2010, since then withdrawal method na gmit nmin, pangany ko is 13 yrs old then nsundan ng bunso ko which 3 plng (withdarwal method) Spotting 6 days after menstruation --> is it sign of pregnancy? --> or just starting birth control pills?