Fear to travel in train. Go by flight?

Since I heard couple train accident last year, from then I am getting fear to travel in train. And this fear for my 3 yrs kid. If I take with him in train, I am getting fear and anxiety. Fear does not come if I go alone. If I book train ticket before 1 month, then for that 1 month on daily basis I keep on thinking to cancel the ticket and go by flight. Flight journey is absolutely fine for me. But sometime it is costly so have to think of train. What shall I do? Shall I stop taking train and go by flight? If not if I have train journey with my kid after 1 month, then how to tackle this 1 month of time? Please advice. I am helpless by these sever symptoms of fear. Any tips would be highly helpful. To reduce the anxiety shall I stop travelling by train and go by flight?