Unprotected Sex, Missed Pills For 3 Days, Spotting. Pregnant?

Hi, I have missed 3 days of my pills in this pack, my period isnt due for another 7 days wen my pack ends, but i havent took them i am now gettin a light brown discharge spooting, is this my period or could i be pregnant as i have unprotected sex, i have now not had a pill for 3 days my period would normally come now but its more like spotting hope this makes sense