Not sure this is a stutter

Not sure this is a stutter I also posted this on r/advice and someone recommended I come here. For the past two or three months I’ve been getting stuck in the middle of my sentences. I usually get stuck on one word and it only applies to the sentence I’m trying to say (ex Well I think that that that etc). I usually end up repeating the word about 5-10 times before I make myself stop and start my sentence over very slowly. It’s been getting more intense recently and I’m not sure to do. I’m 16 and I’ve had no previous issues other than some mental health problems. I didn’t want to call it a stutter because outside of the sentence I get stuck on, I can speak perfectly fine. Any ideas on what all of this might be?