Use four as the ellipsis completes the sentence, but leave a space before it.

Student or Learner
Hello, I'm having some trouble understanding when to use the four dotted ellipsis in dialogue when I want to indicate a pause, and I would be very grateful if you could help me.
This is an example of what I'm talking about:
John sighed and said to himself (he's speaking out loud), "Ah, what should I do...? Rather, what can I do...? This can't go any further.... I have made up my mind. I will talk to Jeremy today and finish this once and for all."
The ellipses indicate that John stops for a moment because he's thinking and is distracted by his thoughts. My question is: Should I use four dots in the sentence "This can't go any further...." since it's a grammatically complete sentence and it would normally end in a period, or should I use only three?
Thank you for your time.
Not a teacher
Use four as the ellipsis completes the sentence, but leave a space before it.
Like this?
"This can't go any further ...."
Or like this?
"This can't go any further. ..."
Not a teacher
Neither.
"This can't go any further ... ."
Typoman - writer of rongs
The ellipsis has three dots. It indicates that text has been omitted. If the sentence with the ellipsis requires ending punctuation, you add it after the ellipsis.
I am not a teacher.