A character in a published post-apocalyptic book (mine is also apocalyptic) has the same gender, same initial letter of my character's name, with mostly the same letters, and has the same external goal as my character in the apocalypse :S (I didn't read the novel, but I heard someone describe her like that, so those are at least, the similarities I found out about. There could be more)
Is this a coincidence? I had done a huge mistake that I am aware of once, and sent my novel to a self-publishing house, but then I refused to publish it there.