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Being low in progesterone especially with a history of PMS and being of the age for Peri-menopause (35-45 yrs old). See the book "What Your Doctor May Not Tell You About Peri-Menopause" by John R. Lee M.D. for more on Peri-menopause and treatments. Also, a fibroid and or endometriosis can cause excessive menstrual type bleeding.

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13y ago
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12y ago

It depends on your weight or hormone levels , or it could be if you just had sex.

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Q: What could cause an early 3 week long period?
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