If you are sexually active and have had sex in last month, the periods may not come, even after taking those tablets and papaya, because you may be pregnant. If you are NOT sexually active, the delay could be due to hormonal imbalance. The tablets taken for getting periods need to be taken from Gynecologist so that proper tablets and proper doses can be adviced You can wait for 15 days and see. If the menses doesn't begin, please meet a nearby gynecologist and get help. The doctor will advice some blood tests and ultrasound to rule out thyroid diseases, anemia, and other hormonal imbalance and ovarian cysts