My mom died.. is there somthing wrong with me? i dont know how to act.?

uhh.. okay my mom died last week.. im not the same anymore.. i guess you can say im pretty mad and very sad too. idk why im so mad but i am. idk how to act around people. my best friends are the bball team . . . and they are kinda like sisters you can say.. they have been there for me. but im just quiet and dont say anything. i do cry a lil but. . . idk how to be.. what do i do? haha thanks...