I Miss My Dad He Passed Away Unexpectedly

I lost my dad suddenly in 2009 when I was 12 years old. I was at school when I was taken out from a science lesson to go to the headmasters office. When I got there my mum was there in tears. She told me that my dad had collapsed at work after suffering a fatal heart attack and had been pronounced dead at the scene. I felt numb. Empty. Scared and shocked. That day has haunted me ever since and was the trigger of my mental health problems.