It definitely sounds like anxiety. I had no idea I had anxiety all my life because I didn't know what life without anxiety was like. Can definitely relate to a lot of the symptoms you're talking about, but my stutter also gets worse when I'm anxious in social situations. I'm on zoloft and wellbutrin for ADHD/Social anxiety/GAD and I do zoom calls with a psychiatrist every month to talk about dosage, how my body is reacting to it, etc. Wish you well!! <3