Try using the command /rewind while in-game. You may also be encumbered from carrying too much gear or items, please check the weight of your character.

You may also try getting unstuck by porting/evacing out of the location, if your class has the ability, or you can get assistance from a nearby player.

On the character select screen there is also a Return to Home button that can be used to move your character back home after it has been logged out for a time.