Can a Hawley retainer fix the gap I have in between my two front teeth? (Photo)

I’m getting my braces off in two weeks. Before braces I never had a gap. After a few months with braces I started to form a huge gap in the two front teeth. After having my forcus appliance in my mouth, the gap closed completely and everything was fine. I got the appliance off and this past month I’ve noticed that a very small gap is slowly forming between the two front teeth. I don’t know why this is happening to me and I hope it’s fixable. Thank you for the help in advance!!