I envy you, Jman, if you are just playing through Link to the Past for the first time. It is, IMHO, the greatest game ever made. I encourage you to try to play through the rest of the game without help from a walkthrough or message board (though I see no harm in your friends helping you out). But if you are really stuck, I can help.
So you say that you have the Pendant of Wisdom, and you are in the Dark World? Where, exactly, are you in the Dark World? Have you fought Agahnim (the wizard) yet? Did you retrieve the major item (not the pendant) from the Tower of Hera (where you fought the giant worm?)
