My mother's suicide. I was an adult when it happened, and there seem to be lots of resources for supporting children who have been bereaved by parental suicide but not for adults. I felt horrific guilt, that I had let her down. I felt so alone. I had an 18 month old at the time, my first baby, and I knew i had taken my focus off mum at a time her life had been getting progressively harder; I knew that I could have done more. I felt like I would never get past those feelings. I couldn't even grieve properly because the guilt was so enormous and horizon-filling.
The process of getting beyond the guilt, facing the loss and grieving was huge and agonising. Through it I realised some long suppressed feelings of abandonment that lay in my early childhood, when my mum had left me and my sister with our alcoholic father to be with her lover, which had been reignited by her suicide. I went so deep into a pain I hadn't ever acknowledged.
I also developed binge-eating disorder (or rather, a long term binge-eating tendency intensified) to cope with the emotional pain. I am still dealing with the physical consequences of that even though I have now made so much progress emotionally.
The main gain from all this is enormous empathy with the bereaved. No-one in my life who loses someone now ever has to feel alone. I push past my insecurities and step forward towards them, offer space and kindness and love even when I'm not certain I will get it right - having been on the other side, I know that while there is nothing anyone can really do, the fact they care enough to try can make you feel much better in the moment.
I have a friend who was bereaved of her baby boy, and I look at her in awe every day of my life. Even to survive such pain and to be able to put one foot in front of the other is superhuman, but she does so much more - she is a compassionate doctor, a wonderful supportive friend, and the most loving mother to her other children. She supports a charity for similarly bereaved parents, and the love for the child she lost shines like a light, never a shadow, in every aspect of her life.
People are amazing.