Hello mrtw: Thank you for bringing your concern here to PC. I see this is your first post. Welcome to Psych Central. One additional forum, here on PC, that may be of interest to you would be the Relationships & Communication forum. Here's a link:

https://psychcentralforums.com/relat...communication/

And then here are links to 11 articles from Psych Central's archives. The first 6 deal with the subject of toxic & narcissistic parents. The next 3 offer suggestions for coping with panic attacks. And the last 2 discuss breathing techniques one can use to reduce stress:

15 Signs You Have Toxic Parents

10 Tips for Dealing with your Toxic Parents

5 Common Struggles Children of Narcissists Face In Adulthood

Coping When You Have a Narcissistic Parent

https://pro.psychcentral.com/exhaust...sistic-parent/

https://blogs.psychcentral.com/permi...sistic-mother/

https://psychcentral.com/lib/tips-to...-attack/?all=1

https://psychcentral.com/blog/10-way...-panic-attack/

https://psychcentral.com/lib/how-to-...panic-attacks/

https://psychcentral.com/blog/reduce...eep-breathing/

https://psychcentral.com/blog/4-brea...ess-right-now/

I hope you find PC to be of benefit.