You have been blessed more than many. You have a multitude of family and friends surrounding you, including a bit of your beloved wife in many of them.
If she has been suffering like I imagine someone with organ failure would, she's certainly in a better place. I learned many years ago that mourning the loss of a loved one, while as natural as can be, it's mostly us feeling sorry for ourselves over our loss.
Your family & friends are going through something very similar as you. They're also mourning their loss, of a Mother, Sister, Grandmother, friend and so on. Try helping them through their pain, and yours will lessen with each effort.
I will lift up a prayer for you and your family. May the Lord ease your pain, and help you remember all of the good things you are blessed with because of your wife.
God bless.