Niffler I truly hope 2018 is kinder to you, if anyone deserves a break, it's you!
If I can make one suggestion in relation to returning to work, and that is a job that is familiar and one which you find easy. While I was waiting for my 'old' job to become vacant I took on something entirely new, thinking my new life would be full of changes so may as well start now. Little did I realise that all the new stuff to learn during the grieving process was too much, but fortunately my old job was available sooner than expected and I found it so much easier to be able to rock up and carry on with something that was 100% familiar.
That 'new' job in normal times wouldn't have been a problem and actually a year or three later I progressed to a much, more difficult job, but by then had worked my way through the grief and was in a totally different space. Moral of the story is to be easy on yourself.
Thinking of you as I know you have birthdays and anniversaries coming up. 