Wearing retainers (it fits me) 5 months after braces removal can shift teeth back into place?

My braces got removed 5 months ago.I used to wear them for a short period of time because I could not speak properly n it used to pain alot.In my upper jaw,front two teeth hav came forward and in my lower jaw,the front two teeth hav overlapped a little.Else everything is fine.If I start wearing my retainers again ( it fits me ) then would I be able to recover this?

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