Huggabug,
I am so, so sorry
That is an awful experience to have had. I can't imagine your feeling of loss at this horrible time.
I'm glad you've got a lot of great support - your Mum and DH sound lovely.
The emptiness does fade, but your DH is right - you won't forget.
Take care of yourself sweety, my thoughts are with you through this terrible time in your life.
XX