Sub FormatManualNumbering()

Dim rng As range
Dim rngEnd As Long

Application.ScreenUpdating = False
    Set rng = ActiveDocument.range
    rngEnd = rng.End
    rng.Characters.First.InsertBefore Chr(13)
    Do
        With rng.Find
            .ClearFormatting
            .Replacement.ClearFormatting
            .Forward = True
            .Wrap = wdFindStop
            .Format = True
            .MatchWildcards = True
            .text = "^13*^t"
            If .Execute And rng.End <= rngEnd Then
                .text = "[,:; ]"
                .Replacement.text = "."
                .Execute Replace:=wdReplaceAll
            Else: Exit Do
            End If
            If rng.Characters.Last.Previous <> "." Then
                rng.Characters.Last.InsertBefore "."
            End If
            rng.Collapse wdCollapseEnd
        End With
    Loop
ActiveDocument.range.Characters.First.Delete
Application.ScreenUpdating = True
Set rng = Nothing
End Sub