Do you have an issue with the sparkly thing disappearing at times? That's a common issue that everyone I know has at times, so I would be impressed if you don't.
In any case, I remember those 3 items and where they are. 2 of them are on the 1st floor of the mansion, while the last one is on the 2nd floor. As soon as you enter the mansion, there is a room on your character's left-hand side. An item should be in one of the four corners of that room (I think the handmirror). Leave that room and go down to the end of the hallway (opposite from the entrance to the mansion). Go inside the room that's on the same side as the staircase. There's another item in there, so just sweep around the borders until you find it. The last item on the 2nd floor is a bit hard to describe, but I think that's the one you have anyway.
I apologize if my directions aren't perfect. This is going strictly by memory. The items should be there though. >>;;