Omg wtf do i do bout this?!?!!?

omgg!! i dont know what to do now!! so i was hanging out with my bf after skool today and we were watching a movie and we fell asleep n wen i woke up i realized i had my period and it was all over his bed!!! i threw the comforter over it and ran home, he just called me and didnt answer! im so mortified!! wat should i do?!?!?!?