My Gran died just before Christmas. She was the first close person to me who died and it was fairly sudden, all happening within a month of finding out she was ill. She also suffered with dementia as a complication from her illness which made it emotionally trying for different reasons, added to the fact my daughter was only 6 weeks old when my gran died. I was quite involved in helping my mum and grandad clear her stuff etc after she died and its triggered a huge amount of anxiety in me for a few reasons:
A) my mum is single and it really hit home that should she die, i am her next of kin and would be responsible for doing all of the post-death stuff by myself mostly. There is no reason to think she is going to die any time soon but my anxiety isnt very rational.
B) i have become incredibly anxious about my kids safety. I am a bit of a worrier but never to this extent. If my MIL has my baby for a few hours im convinced they will be in a car crash or i keep having nightmares about them dying. I fell down the stairs with my baby two months ago and now every time i go to go down the stairs i physically feel my legs wobble and picture dropping her over and over.
I have had anxiety before and previously had some cbt but this is completely different. Its not even specifcally linked to my gran herself, its just her death triggered it.