Doesn't show my avatar on the home screen and I can't change it.

Whenever I login it shows my avatar as a loading circle. I wait 2, 5, 10 minutes and it still doesn't load. I go to the "Avatars" page and it has none of my avatars there and I can't make a new one. Whenever I go into a server or a world it shows me as Steve and I can't change my avatar there either. This has been happening for a while now and I don't know what to do.