Temporary or stress induced stutters?

So I came across an odd situation and I like to know if any of you are in a similar situation or have seen such a thing. My friend sort of disappeared for a few weeks. When she returned, she revealed that she had been ill, but didn't specify what happened. She mentioned going to a hospital the whole time.
Now, I immediately noticed she had developed a pretty significant stutter.
However, the very next day, it was completely gone.
Since then, I have not heard her stutter at all.
I'm wondering if anyone has ever heard this, because I immediately began questioning if I had simply been imagining the whole thing. I have some symptoms that could have caused such confusion, so I'm just wondering if any of you know of or have experienced anything similar. Is this a real thing that can happen?

I have a stutter that comes and goes. it usually does not last longer than a week and sometimes lasts less than a day. it is related to PTSD and trauma for me. I hardly ever stuttered at all as a child and when I was 20 it started. I wonder though if what i have might be more accurately called cluttering.

I don't stutter on a day to day basis, more or less just in a few sentences here and there when I'm either-
A) having a massive bout of anxiety
or
B) am thinking faster than I can get my words out

I don't know if you'll find that helpful or not, but ? I thought I could share in case it would...

I develop stuttering when I am very stressed. I do have anxiety/panic attacks which have landed me in the hospital for rule out heart attack. Very unpleasant. Feels like I cannot get my words out. It's like the words are just stuck, won't form, frustrating. Of course, then I am even more anxious because of the stuttering. My ex would get angry at me when I did that and yell that I was faking it. Why would someone fake this? Oh well, that is a different animal.
I don't stutter now that the stress is out of my life. Also, I would choke on food. Doctor ordered a swallow study once when I was in hospital. The tech brought in liquids and semi solids such as pudding type foods. Those I have no problem with. It is solids, like meats, bread. Also have dry mouth cuz of medications. Don't know if the dryness contributes to the stuttering, I know it does the swallowing to a point.
For others suffering with this, I hope what I have said gives some hope. Stress can really ravage our health. And, for no good reason.

I get nervous and stutter when stressed out and have lots of anxiety. Then when I feel calmed down, even if it's just a couple of hours later, it goes away. My stutter is there and I don't believe it will ever go away, but it also doesn't show up all the time or even hardly at all. Just certain times.

Mine wax and wane too.

I was speaking with a journalist today, and the word -when- was impossible for me to get out. It just hung out in my head never to reach my tongue.

It was the one time I wish the woman would have filled in the blanks. O well, I survived the embarrassment.

I understand the feeling. I called my sister-in-law and for whatever reason my stutter came out I couldn't speak. Low sounds came out on the phone and she mentioned that she got a call from someone and other mean things. I just acted like, Oh really? It was me and I just shook my head because what else could I do. People don't always understand those who stutter and how hard we are on ourselves (at times).