Due to shenanigans of my Dungeon Master, my character managed to get an [Amulet of the Planes](https://roll20.net/compendium/dnd5e/Amulet%20of%20the%20Planes#content), but accidentally teleported into Castle Ravenloft while playing the Lost Mine of Phandelver. Can my character use the Amulet to leave Barovia, or is it stuck there until I finish that campaign?

If it helps, my character is a Level 4 Warlock.