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I made it to the underdark, I did all I could do (I think) I did the part were I am supposed to save the dragons eggs. I killed the monster the drow gave the eggs to. So I pick up what I thought to be the eggs still ok. I saved it thinking I did it right but when I got to the dragon it attacked me. well I killed but now what do? I do how do I leave the underdark?? Help please.

You probably gave the dragon the wrong eggs. Go to the KuoTua dungeon to the west of the map. There is an entrance to the surface there guarded by a bunch of drow. The entrance isn't marked on the map but it's to the west of the svirfnebli village.

ok I found the cave but I didn't find anything that helped there (but there was some good items)

Did you see a bunch of drow defending a door?

yes and I killed them all.

I tried all I can do but they the drow garding the door had nothing of value.

The drow themselves have nothing. It's the door they're guarding that leads to the surface. You should be able to escape the Underdark through that door.