Sounds like mine!
Not pleasant at all - if you are worried then see your DR but I was changing my tampon every 1 hour [apologies if tmi but believe it may help you]
Lighterlife state on their website
Hormones that govern the menstrual cycle in women are mostly found in fat between the waist and the knees. The balance of these hormones can alter slightly whilst losing weight. Due to this, while using a very-low-calorie diet, women may find no change in their periods or that they temporarily become: - <LI class=MsoNormal>More or less frequent. <LI class=MsoNormal>Heavier or lighter.
- Stop.