My period is nine days early (I got my last one exactly when expected last month, after taking Plan B) ... yes, I am still on the pill -- so I should not be having breakthrough/withdrawal bleeds on the "active" pills in my packet.

I am scared my bleeding might be implantation bleeding, but how do I know if it's from Plan B (taken on November 22) or from having an implantation pregnancy?

What are my odds for either?
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replied December 17th, 2007
Extremely eHealthy
Your odds of it being 'implantation' bleeding are SLIM to none.

Implantation bleeding, MEDICALLY speaking, is very uncommon.

MANY women have breakthrough bleeding while on the pill, ESPECIALLY after using PLAN B, or taking pills later than usual.
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