Tick, Tock, Tick

I'm feeling really frustrated because I want to be a writer, but I don't have anything written! I know that sounds absolutely ridiculous, but that's just how it is. I've been reflecting on my own writing style and habits, and I've come to the conclusion that my weakness is story. Don't get me wrong, I can get Character A and Character B from X to Y with a few subplots inbetween perfectly well, thank you, but when someone asks me 'What's it about?' I get stumped. I vaguely have a notion of what I would like the story to say on a deeper level, but find it difficult to get my story to reflect that. I know, "practice makes perfect", but noone's getting any younger. I read in this book I got out of the library (can't remember the title right now), that having one child = two books (in terms of time, energy, etc). It was controversal when whoever said it said it, but I can kind of see what they mean - I have friends who have kids and they don't even have time to have a conversation with their husbands, let alone write a manuscript. I really want to get a book published before I have a child. Not that I'm planning on having children in the next few years, but it's something to think about (especially when everyone around me seems to be 'up the duff'). I feel better for ranting now, so hope you'll excuse me!
I've been thinking of radio, and so I emailed Amanda and asked her for her advice, as she's written quite a bit for radio now. She told me that radio is a lot more intimate than theatre, and sent me one of her radio scripts to look through. This is where story comes along, as radio is all about the storytelling. Think I might have a go and adapting Hoodies and High Street Aphrodite for the airwaves.
In terms of Inter Vivos - still not finished. Am thinking that maybe I should just trust my inital feelings and set it in the near-future, rather than in it's own dimension. Should not let people sway me before a) I've finished and b) they've read it.