My grief came in another wave at the just over a year mark, I kept up being busy, pushing through, making the effort, but in the end I needed the time and space to grieve.
I knew I was struggling, and told people who were sympathetic to an extent but nothing changed, I started feeling suicidal and one day I just could face anything and was completly tapped out.
The Gp was amazing, signed me off for six weeks which was the time I actually needed rather than 3 days i spent organising funeral etc. Id say it took another six months to start to recover with counselling, stress and anxiety courses, practising mindfulness and re prioritising what I thought I must do into what i could do.
What im saying is that as a culture, i dont think we deal with death well at all, the support is really only accessible through a medical route - which is pretty poor when it literally happens to everyone.
Do you have safe people to talk to? When I told DH how bad it was getting, he really couldnt have handled it better, he was incredibly calm - not everyone is like that, but please talk to someone face to face about how you're feeling.
All the best.