I know how you feel, I've been there, so my thoughts are with you.
People fail to realise that the earliest weeks are not the hardest, you are surrounded by people and organising the funeral distracts you from so much. It was after the funeral, when all the family and not so close friends went back to their own lives that the reality of it all hit me. Sorting out the paperwork, bank accounts and other things were not what I needed. I was lucky on two counts, a wonderful friend and her husband got me through dark times and I don't have to worry about healthcare, costs or insurance as I'm from the UK.
Don't forget to take care of you, grieve your own way, not how anyone else tells you to. You will have good days and bad days, that's normal. Do what gives you comfort, I would take my lunch and sit by my husband's grave and talk to him, it helped me even though my family thought it weird, but, it was helpful and you do what helps you.
The time from the persons passing to their funeral is about them and making sure they get a proper send off. After the funeral people should remember the loved one left behind.