Advertise to people about your story, see if anyone wants to see it? If not, write it anyway, just don't post it, though, I personally wanna read it...Eventually...

I'd say write it down, if it gets shown publicly or not is really up to you, I know I would be interested in reading some of those ideas floating about in your mind. However if you don't let it be available to be read, you won't have a chance to have a success with it. If it doesn't work out so well; live and learn and try again if you so desire. But if it is a big success, I hope quite a bit of good goes your way.

You have doubt.

A fair bit from the sounds of it.

Do it anyway.

Plagues come and plagues go. People can't always find a cure; people just need to work through the ordeal.

Some things are cliche for a reason - like basil and tomato. There is being made to work for a cliche, working with a cliche, and making a cliche work for you, adapting it to your style and using it as a vehicle to get where you want to go.

Success in writing is not found in the first draft. If you want to succeed, if you want to be grand, then you need to not only accept that your work may not attract a sizable following, but also that you may need to revise things, both liked and disliked. You have to "kill your darlings," so to speak.

If something does not fit, you must either remove it, or build around it until it does. The choice is up to you; but remember, you can always save the vignettes you love and use them in the future.

I say give it a try. Throw some stones into the mix and see how the liquid settles.

It varies per person. What do you think usually inspired you to write?