Find and replace if specific conditions aply

[Omeva]

I need help for checking citations. I have to check long documents if "cf." Is used correctly. I either need a way to highlight the brackets or sentences in which "cf." Is used or for the VBA to do it itself.
If there is a "." Or any word in front of the bracket it needs "cf.". If there are quotation marks in front of the bracket there should be no "cf."
For example this is correct:
example. (cf. Weber 2010)
Example (cf. Weber 2010)
This is incorrect:
Example" (cf. Weber 2010)
Example. (Weber 2010)


I tried something to highlight sentences with quotation marks, but it is not doing what I want, please help

Sub CheckParentheses()
' CheckParentheses Makro
Dim paragraph As paragraph
    Dim Doc As Document
' Set the document object to the active document
    Set Doc = ActiveDocument
' Loop through all paragraphs in the document
    For Each paragraph In Doc.Paragraphs
        ' Check if the paragraph has the "Standard" style and does not contain a parenthesis
        If paragraph.Style = "Standard" And InStr(paragraph.Range.Text, "(") = 0 And InStr(paragraph.Range.Text, ")") = 0 Then
            ' Highlight the paragraph in yellow
            paragraph.Range.HighlightColorIndex = wdYellow
        End If
    Next
End Sub