This is your nervous system in overdrive, it’s not burn out. Dr Hanscom calls it agitation.
For me, getting more in touch with my emotions and also taking time to check out - meditate (for about an hour) helped.
Are you doing TMS work? Self-discovery, unhooking your brain etc? Eating healthy, getting sleep?
Dr. Hanscom explores other great ways to help regulate your nervous system. Regulation takes time. My brain fog and inattention faded but I am still very aware of loud or jarring sounds.
https://backincontrol.com/tune-your-nervous-system-and-lower-anxiety-you-have-the-controls/ (Tune Your Nervous System and Lower Anxiety - You have the controls)