I'm so sorry to hear of your tragic loss, your beloved's loss reminds us how volatile life can sometimes be, but it never prepares us in how we cope afterwards. I think we can all agree 'Grief does indeed suck'. As I've stated previously I can think of nothing else in my life which has had such a massive impact on me when I lost my wife 9mths ago and I'm sure that applies to the majority of us on here including yourself.
We naturally assume that our loved ones will always be there, to share our life with, and then in a moment it's all changed for ever, and we wonder if we can carry on without them in our life. Everyone here understands what you are feeling right now, there is truly nothing worse. I hope the counselling helps you, and that you get some comfort by posting on here, having to explain to a 3yr old son that his Daddy won't be coming home must have been heart breaking.
Reading your story made me feel a little guilty and humble, because in many ways your loss is greater, I was fortunate in that I had almost 49yrs with my wife but to have just 6yrs is very little time, my heart goes out to you, I just wish there was something I could do to ease that pain you are feeling, I genuinely do.
I also wish there was a quick cure for grief but sadly there isn't, time is the only thing that brings some relieve but it takes a very long time, and it's likely that many of us will never be the same again.
I wish you much strength during this difficult time.