I haven't worn my retainers for a few months and now I have a gap. Will wearing my retainers all day close the gap? (photo)

I had braces for 3 years and I never had a gap in between my two front teeth before. They shifted my front teeth dramatically so that during sometime with my braces I did have a front tooth gap. But I forgot to wear my retainers all the time. I started to notice that I was beginning to get a gap. I can still wear my retainer but they don't fit all of the way. If I wear my retainers all day from now on will my gap close?

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