I am so sorry too
You will get through this, but it's one day at a time - sometimes one minute at a time.
My best friend went through the same, with small children. She asked folks for a dish of food for the freezer when they offered help -something simple like bolognese, or chicken/veg that she could just defrost and pop on pasta, or with baked potatoes when she didn't feel like cooking.
She also found rainbows a big help www.rainbowsgb.org
Also reposting what Knitting posted earlier for you, in case you missed it among the other messages
Can I suggest that you have someone look at the Bereavement Support Payment for you because the last thing you want to be worrying about is money. This was the only money I received before I had to pay for the funeral, they made the lump sum payment in two weeks. I had savings but if I hadn't I would have been living on fresh air until the pension companies got everything turned around.
www.gov.uk/bereavement-support-payment
Thinking of you. Theres a good book about the practicalities called "What to do when someone dies" from Which with a checklist in it, to make sure you have covered all of the bases.
Thinking of you.