Emma - adding my thoughts to the others - welcome to Purrs, and I'm sorry its through such devastating circumstances.
We've lost two of our cats in the last 18 months to road traffic and I know how heartbreaking it is. So many of us here do, and everyone here understands how awful it is to lose one of our beloved companions.
Sending you big hugs. Feel free to share your thougths and feelings, and your pictures of Hulk if it will help.