Irregular Menstrual Cycle

I am looking for some kind of herbal pill, or really any kind of pill that will make your period regular. The reason I am looking for this is because I am going on a trip to florida, and I will most likely be on it that week, so I was wondering if you have any information on any kind of pill that has any thing to do with you menstrual cycle.

Irregular periods are generally due to hormonal imbalances. Causes of a hormone imbalance include: deficiency of vitamins and minerals, drugs such as antibiotics, stress, allergies, lifestyle changes, travel, low thyroid function, chronic illness, approaching menopause, underweight or overweight. To see long term results in balancing the hormones, the cause must be found and rectified.
Vitex agnus-castus balances hormone secretion from the source, the pituitary gland. A daily dose of two to three ml of a 1:5 tincture can be taken first thing in the morning, on waking. For other formulations or strengths of the herbal tincture, follow directions on the bottle.