A simple gold or silver necklace should go with the dress since the dress already has a nice bling area. Earring depends on your hairstyle. Try to match your jewelry to your dress so it blends and doesn't take away from the dress. Do you have a tiara or hair piece yet?
Some earrings to match the chest bling would look great, you could do any type of earring especially big and bold! I agree that a necklace would be too busy if you are doing a veil I think one with some bling around the edge would look fantastic! Or a plain elbow length one! Also, LOVE the skirt of your dress!
Beautiful dress! I think the way the embellishment is at the top, it frames your face/neck, so I would go no necklace, and some small to medium sized drop crystal earrings (trying to match the bling style with the top of the dress).
Go more simple, as too much jewelry would take away from the statement of the dress.
Perhaps just earrings, and maybe a delicate bracelet (maybe even a borrowed heirloom or something from mother/grandmother?)
Are you doing a veil? Because you could get a headpiece and/or a comb that also matches the bling on the dress!