What Genre?

I have to blog this morning. I wasn't going to, but I have to or I won't be able to move forward on my NaNoWriMo this morning. It's a brain thing....

I was reading the guidelines for a contest and am stuck as to what genre my NaNoWriMo falls in.
Here are the different genres! So many to choose from and yet my novel falls into 3 or 4
How do you choose!
http://www.harlequin.com/articlepage.html?articleId=538&chapter=0

It is a tragic love story, with friends and family for support. There's some sex (Originally I wasn't going to have any, but it needs to be there) There isn't a happily ever after, but there is a closure. A feeling of content. It is actually the first book in a series, but can be a stand alone novel. The last book in the series is also the same way. It can be a stand alone novel and it does have a happily ever after ending. There's no traveling to foreign countries, or history involved so I don't have to worry about those genres.
Here's a link to someone else's blog and his problems publishing concerning genre.
http://www.writersdigest.com/editor-blogs/guide-to-literary-agents/your-job-is-to-write-not-worry?et_mid=526100&rid=232953210

And here is the contest link.
http://www.soyouthinkyoucanwrite.com/contest/

Oh and the Q4U is, Do you query it as the series to agents and publishers, or do you take a chance on the contest?