Charri Waddington

a couple days ago i must of hit something wrong all the sudden nwo i cant hear anyone talking in local chat and i cant use my mic they cant hear me but if i go to IM and call them then my mic works and we can talk ,.....its like ive muted local chat somehow ? if they are infront of me talking they dont show in my speaker and they say i dont have a dot over my head ....... help its been working for years now all the sudden i cant i did something