I am 23 years old, 160 cm, 82 kg. I have always had regular periods since i got my first period, which was 13 years ago. I started taking Roaccutane which is an anti-acne medicine since June 6 ( the last or before the last day of my previous period), however, my current period is late for two weeks now and i am sure i am not pregnant. Please also note that starting July 1st i started a weight loss program and some exercises and treatments to help me in weight loss. Thank you