Sudden stutter onset in 8 year old girl?

Sudden stutter onset in 8 year old girl? I don't know if this is the correct subreddit, I apologize if it's not. I'm a special education teacher and one of my students has started stuttering 2 days ago. She is 8 years old and has no history of stuttering. She also has a cognitive disability (IQ 70) but her speech is pretty much unaffected by that. I am worried, she started behaving weird in August, after summer break. She started sucking her thumb, has a lot less energy and constantly refuses to do work and now she's also starting to stutter? It seems weird to me, but I don't know if stuttering can have anything to with this? Like if something is going on at home is that a reason a 8 year old might start to stutter? I suspect something is going on at home and am trying to find out more so I can act accordingly and I'm trying to gather information. I can only find sources that talk about stuttering age 2-6... So my question is: can something happening at home be the reason for an "older" child to start stuttering?