Ok i'm worried please help?

Ok so me and my friend were talking on the phone when all of a sudden I heard this weird noise an then the phone hung up. I tried calling back she just hung up. I tried a few 분 later it rang an rang and rang . She is not responding to text 또는 calls 또는 anything! Please I don't know what to do i'm not sure if its because i'm a extremely paranoid person 또는 what? Should I wait till tomorrow 또는 try an get a hold of her now? 또는 what would 당신 do in this situation?