Pill or AF

AF was due between this past Saturday or this coming up monday. Last night i went to the restroom & when i cleaned myself i more than spotting. Today in the morning when i went to pee (TMI) but there was actually a somewhat amount of blood in the toilet not just mixed in with my pee but kinda sitting there i guess it dripped while i was sitting down. My question is if this is my period or plan b spotting? I took the pill last Thursday.