Taking the Plan B pill.

I have been with my boyfriend for over 3 years now and we have sex often. December 7th 2014 we had unprotected sex and I know he came inside of me. I took the pill the day after (8th of December 2014). Now, two days ago I started bleeding, and I'm still bleeding. I know one of the side effects of the pill is change in vaginal bleeding. 
My question is, is it normal to have the side effect of bleeding/spotting this far after taking the pill?
Please, only honest and helpful comments. If you have nothing nice to say, then don't say anything at all. Thank you! ? 

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