My Mirena fell out on 10/26/14, I freaked out & called my doctor for a plan b pill I took it the same day.. I got a heavy period on 10/30/14 that lasted until 11/7/14.. I had unprotected sex that night and again on 11/13/14.. I usually get my period on the 10th before all this happened.. now I feel pregnant but 5 negative pregnancy test.. Is my cycle off due to the plan be or should I be counting my regular 29 day cycle from the period I got after the plan b or from my regular expected date of the 10th? Confusing I know, can someone please help me???