Invisible but not to other players

So one day when I joined a server I was completely invisible and I asked my friends if I was invisible to them and all of their screens showed my character so I tried going into the skins but it would only be showing the loading screen it would never show a skin option and now I am unsolved as even when I wear armor I am invisible and this doesn't change when I'm in survival or in a single player server I'm still invisible but only to me no one else.