Could I actually be 16 & pregnant..

I had unprotected sex all through my fertile window with my boyfriend and 2 days ago AF was due, still never came but yesterday I thought I had gotten my period I wiped and seen a little light blood so I put in a tampon and went to change it a couple hours later and there was no blood but a brownish pinkish residue so I went to sleep and woke up and still no blood, eve says I'm 2 days late. So can I be pregnant? Is this spotting? Someone please comment  ,