Me and my boyfriend had unprotected sex using the pull out method on December 18th, my last period was December 2nd. My period is usually irregular. I took plan b the next day after sex and experienced no immediate side effects such as nausea or headaches. I was expecting my period around January 1st but it is January 8th and I just got some light bleeding that I noticed when I wiped from going to the bathroom. Me and my boyfriend are so worried it could be implantation bleeding as we are both in school and not ready for a child. I'm experiencing some weird feelings in my side or lower stomach area ever since several days ago but it has become more noticeable than before, sometimes by my belly button (I wasn't sure if I was over analyzing every little thing.) I'm not sure of this pain is just because I'm getting my period or if I'm pregnant and having implantation bleeding. Please help me