Hi Bren,
First, I want to say that I am so sorry for your loss. First and foremost, you need to take care of you. Get rest, as much as you can (even if you can't sleep), drink plenty of water and try to eat right.
Every day is a challenge, I can tell you that. My husband died really quick after being diagnosed with cancer. I know the big thing that got me through was setting a goal for myself each day. I had to have a reason to get out of bed. It didn't matter what the goal was - making a phone call, doing the laundry, doing the dishes, running the vacuum. I've been faced with quite a few days that I didn't want to get out of bed, but I had to in order to cross something else off my to-do list. And, honestly, some days the only thing I got accomplished was getting out of bed.
Journaling helps. You have to get the emotions out. Commiting them to paper helps. Also, posting on this forum helps, too. You can vent away and know that you'll eventually get a reply. And we all understand.
Be gentle with yourself Bren.