Oh, my goodness...so many things to stress over.
Okay, Cat, take a deep breath and relax.
Your dress is lovely and the tiara, especially since it will be "specially made," will look beautiful with it.
The most important thing to think about here is that you radiate your joy and happiness on your wedding day regardless of what wear or don't wear.
Just remember, you will be surrounded by your family, Catina's family (mates, etc.), your dear friends from school and, best of all, Carl will be at the end of your walk down the aisle to join your lives together to begin your adventure as husband and wife. That's all that really counts.
When it's all over, your wedding clothes will be packed away and the tiara will be carefully put away. Please try not to stress here. Focus on the joy and happiness of the event.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!