Cant see any skins and or get signed out repedly from my account.

So recently I started to play minecraft again after not playing for around 7 months now, I tried to log into minecraft which did not work and when it did it signed me out of my account when I went to switch my Skin and or user. I dont know why but i also can not see any skins on muiltplayer and or my own in muiltplayer. Please help me.