Can I wear a veil then change to a crown?

Hi Lovely,
Definitely! You will remove your veil after the ceremony / photo shoot anyway. So a crown or a headpiece is perfect. 
The other option to consider is wearing a crown over your veil during the ceremony & remove the veil later. 
Congratulations!

Congratulations on your upcoming event. I can sense the excitement. I think you need to make up your mind about the look you really want and make some hard choices. Stick to one look to avaid the fif faf at the event. Either a crown with a veil or just the crown. Changing the two in between is a bit of a mess considering the fuss taht will have to go into fixing your hair and the limited time that is available on the day. 

Hi hun, congratulations on your upcoming wedding - how exciting! You can wear a crown and a veil at the same time and take the veil off later as well. I think it gives you a good variety of looks as well. Have a look at my bridal jewellery and headwear as I have a number of beautiful crowns and good luck for the wedding xx https://www.angelina-alvarez.com/collections/bridal-wedding-jewellery-online

I think this is a beautiful idea. 

Maybe you can have the veil on a hair comb and wear a crown as well. Then you can just take the veil off and leave the crown in place. That way the hairdresser can weave the crown into the hair to make sure it really stays secure all day.