Describe a stressful event in your life (that you are willing to share) and how

Describe a stressful event in your life (that you are willing to share) and how it affected your mental and physical wellbeing. What coping tools did you implement to get through the challenge? In light of your studies in mental health and wellness, what might you recommend to someone who is currently experiencing the same stressful event now?
The stressful event in my life is when i lost my father in 2017. i feel guilty till date for i insisted he went to the hospital as he was a diabetic and had pricked his toe with a nail. i was scared he might get a tetanus infection. he went to the hospital and was giving a glucose drip which let to sepsis and he died. still blaming myself till date.