Plan B side effects, help?

so...my fiancé and I had unprotected sex and I took the plan B pull within the approved time frame. I read all the side effects, took the pill, and started my period today so--yay no baby--it came early. I'm okay with it being early, my only problem is, it came too early I think. My last period was only about two weeks ago. Should I consult someone? Will this completely through off my normal cycle? I just don't quite know what to think about it...