I found my dress today. It was the 2nd dress I tried on and after a few...

I found my dress today. It was the 2nd dress I tried on and after a few changes here and there and changing hair style and adding things etc it ended up being the perfect dress. I didn’t want to take it off..... However, now I’m feeling quite depressed and down. Is it me having 2nd thoughts on it or is it just the fact I’ve spent the last year and half looking online at dresses and building up to the day of going dress shopping and now it’s all over? I actually feel like crying and I don’t know why. When I had the dress on I could have stayed there for hours looking at myself in the mirror. Is this feeling normal? I don’t have any photos on my phone of me in the dress and I told the people that were with me not to send me any photos as I don’t want to keep looking at it Incase I go off it...is that normal to think that too?