derrymacash,yes, you carry left/right with you when you turn or walk about, but east and west not. They remain stable. If something is in the westof you and you turn round it is still in the west of you, but whether 'west' is left or right from you has changed.
When you describe some landmark in relation to your town or house and use the words 'east' or 'west' you do not have to add 'if you come from ...' to make it unequivocal. If you for instance say 'The bus station is to the left of the train station you always have to add 'when you face the train station' or 'when you come out of the train station'.
Wolfgang