For my entire life my mom has always gone overboard in pointing out the dangers of the world. If I wanted to play on the front lawn I couldn't because I "could be kidnapped or murdered". She always points out the worst possible outcome. I have heard probably more than 100 times in my life the phrase: "The majority of household accidents happen in the kitchen and the bathroom". She never misses the chance to share a one-in-a-million horrific outcome that someone had while doing a relatively benign activity to show why we need to always be careful.
Luckily, I made it to adulthood without a major complex until recently when I was mugged and injured – after which I spiraled into a severe anxiety disorder. I was having multiple panic attacks a day and would even find myself insanely afraid in the shower (hey, that's where the household accidents happen, after all!). I have gotten multiple opinions from psychiatrists and am undergoing intensive therapy, but basically it boils down to this: in order to offset the messaging I got during my childhood I convinced myself the world was 100% safe and once that worldview was shattered all the stuff I absorbed from mom's paranoia came bubbling back up.
I have tried to bring this up in a non-accusatory way while gently asking her to refrain from commenting on something if she doesn't have anything positive to say. Recently we were out somewhere with a pool and the first thing my mom says is "I can't believe they would have a diving board. Do you know how dangerous diving boards are? I heard about someone who is fully paralyzed and can't even speak now". I told my mom to please stop pointing out things like this, as it was impeding my PTSD recovery. She got highly offended, blew my concerns off, and blamed my issues on the fact that I occasionally watch horror movies. I pointed out that I didn't find the villains in my movies (mostly super campy old b-movies) realistic enough to be scared, but I did find true stories of people doing normal things and ending up completely debilitated quite anxiety inducing.
I'm stuck at a crossroads now because I love my mom, I know she loves me, and I believe she genuinely has a good heart and means well – but having someone around me act like the personification of an intrusive thought makes recovery more difficult. I know we get limited time on earth with our parents and I don't want to squander it, but she can't stop talking about stuff like that. I don't need someone constantly telling me the worst case scenario (I'm trying to get my brain to STOP doing just that) but she flat out refuses to acknowledge the issue. I can't avoid things that will trigger her into saying stuff because it is always so random and out of pocket. How do you get someone this stubborn to stop being so defensive, listen, and respect boundaries?
TLDR: I have a severe anxiety disorder but my mother won't stop pointing out one-in-a-million worst-case scenarios involving unavoidable daily life things. How do I convince her to stop doing this?