i joined jim since two weeks and my periods is delayed by 13days.why

i joined jim before two weeks and also controlling my diet. no potato,banana,sweets and many more. i do exercise for two hours everyday. so does that affect my menstrual cycle?i m 30years old with one baby girl. i missed my period for the last 13 days, my date was 12th march.please help me out of this and give necessary advice.

Are you pregnant?