Tell the story that needs to be told, in the way it needs to be told, to the length it needs to be told.
Don’t poison a story by insisting it must be an apple when it’s really an orange.
Don’t stunt a story by forcing it beyond its natural growth nor by forcing it to grow in a box too small.
“Genres” and “standard story lenghs” are publisher’s artefacts, not part of storytelling.
Breakthroughs don’t come through abiding by conventions and working in boxes.
Dancing Treefrog 
Always good to be reminded about these points! I never would have finished my book if I continued to remain trapped within traditional writing conventions. Once I let go, everything flowed.
Thanks and congratulations of finishing your book!