I had unprotected sex in on january 14th i had my period on january 26-feb 2nd now on 2/15/16 i had light spotting and next i had blood flow preggy?

Not at the same time: A girl cannot get her normal regular period and be pregnant at the same time. However, she can get pregnant a week or two after her normal period. If she has some spotting or light bleeding that doesn't look like her normal regular period, she can check a urine pregnancy test about 3 weeks after sex (when conception might have happened) to see if she is pregnant.