📞 Panic every time my phone rings late at night since my brother's accident

My brother was in a serious motorcycle accident about eight months ago, thankfully he recovered well and is mostly back to normal now, but the actual moment I got that specific late night call telling me about it has left a mark that has genuinely not faded the way I expected it to over time. Any phone call after around eleven at night now sends a real jolt of panic through me, heart racing, hands actually shaking slightly, before I have even looked to see who is actually calling. Most of the time it turns out to be nothing significant, a friend calling by accident, a delayed notification sound I mistook for an actual ring, but the physical reaction happens regardless of the actual outcome each time, my body apparently reacting first and my rational mind only catching up a few seconds later once I have already confirmed there is genuinely nothing wrong this particular time. Mentioned this to a friend who works in a medical field, and she said this is a fairly common trauma response, the mind essentially associating a specific trigger with a past genuinely frightening event, and that it often does fade with enough time and repeated evidence that the same trigger is not always meaningful. Logically that explanation makes sense to me, but eight months in, the actual physical reaction has not really lessened much at all despite plenty of harmless late calls in between. I have started putting my phone on a slightly different, more distinct ringtone specifically for close family members, hoping that a quicker way to identify who is actually calling might reduce that initial few seconds of genuine panic before I can actually see the name properly on the screen. Have not really talked to my brother directly about this specific reaction, mostly because I do not want him to feel guilty about something that was obviously not his fault or something he could have controlled at the time it happened. Has anyone else developed this kind of specific trigger after a scary call like this, and did it actually fade naturally with enough time, or did it need something more deliberate to actually work through it properly?