I can not find my friend?

I can not find my friend, I went to the doctor yesterday then I came back and I was hoping to tell my friend about it after I slept like I looked for them normaly we talk for hours and play games and they always are happy to talk to me but after I woke up I can't find them what should I do? They normaly show up when we need to talk but they haven't yet should I just keep wating or what? It's not normal like we been together for a few years and they have never been gone like this for this long