So I got my braces off a day ago. Tonight, when flossing I noticed a small gap appearing between my 2 front teeth. The floss literally slides in easily. I’ve never had a gap between my two front teeth before braces or during treatment as I had overcrowding. Now the neighbouring teeth on either side also kinda hurts and is abit sensitive when flossing. Why is this happening?

I’m only going to get my retainers next week, so I will definitely ask my ortho about it then. But in the meantime, will the gap get bigger?