Breakthrough bleeding is any bleeding aside from your actual period. One of the few times I’ve ever had breakthrough bleeding was while taking birth control pills. But I have also heard that stress can cause it as well. If you are experiencing heavy bleeding more than normal between periods or for more than 7 days on your period, you really ought to see your healthcare professional.
I wish this kind of information was easily accessible when I started by period, because nobody told me anything. That was in 1985, so we didn't have the Internet. Awesome job of providing the information and reassurance that women of all ages need." - Dee
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