Thread: early period question

I am on a pretty good scheduale with my period always ON TIME never late or early. I am on an every 21 day cycle. I usually know down to the minute i will get my period. But last night i couldnt stop waking up of horrible pain. I still have it right now i tried a hot shower and everything. Well i'm bleeding but not a constant flow just a stream of it then no more. why would I be 10 days early? anybody know. I'm not realy too concerned just a litle confused. I'd appreciate if anybody had any ideas
Thanks

I have the same symptoms. Last month my menstrual was a dark color that lasted 2 days and this month, I am 10 days early.
I hope some1 replies.
take care