Advice needed…again!

So I said I was going to do NaNoWriMo this year. I've even been looking forward to it, doing the plans for my book and pre-writing blog post reviews, so I will be able to concentrate on it. Only now I am having second thoughts.

Here's the thing: I had thought my new novel would be out by now, and that I would have got the initial promo off the ground. However, as normally happens with things, they always take longer than you think they're going to, so it probably isn't going to be out until closer to the end of the month.

The second thing is that I am finally having some luck placing short stories and I am really enjoying writing them. I'm worried that if I just stop I won't be able to get back on track again.

Thirdly, the novel I have planned for NaNo, just isn't the sort of thing I normally write, and while my heart says it is a great story that will sell, my head says that I shouldn't be mucking around with different genres and that I should stick to what I know. A good friend of mine commented that a writer is like a 'brand' and that all of the successful ones have stuck to the same kind of formula.

My husband thinks I shouldn't do NaNo. He thinks I should concentrate on one thing – being a horror writer and doing what I love – but I still find myself being tugged in the direction of NaNo.

So, what do you think? Am I just getting pre-Nano jitters or am I making a sensible decision by letting it go? I would love to hear your opinion!