Does breakthrough bleeding after Plan B mean that I'm not pregnant?

So I got my last period sept 5 and it ended on the 11th or 12th. My bf and I had sex for the first time on the 14 and of course the condom broke. He pulled out, the condom had spermicide and I'm almost positive I wasn't ovulating but I freaked out and within 24 hours I took plan b. A week after I had the brownish heavy bleeding for about 4 days. I was assuming my next period would be October 6 but it didn't come so I freaked and took a pregnancy test and it was negative. It's now October 10 and still no period. Did I Calculalte my period wrong or is there still w possibility I am pregnant? Please help!

Yes, they are both emergency contraceptives. Good luck.

Missie

Hello Anonymous,
One side effect of Plan B is changes to your menstrual cycle. That means your period could start later or earlier than normal. Also, your flow can be heavier or lighter than normal. So, the bleeding that you experienced is a side effect of taking Plan B.

For clarification, this is directly from the Plan B website, "The only way of knowing whether Plan B One-Step® has worked is when you get your next period, which should come at the expected time or within a week of the expected time. If your period is more than seven days late, you may be pregnant. "

Wait to celebrated once you have gotten your next period.

Maryann