Jules and Natty, I know exactly how you feel. I was SO much happier knowing what my "routemap" was. I was at my most unhappy when I was sent away with 12 months of clomid and told to come back if it didn't work. Eventually I paid for a private consultation with my consultant, which was a great way of discussing the options and our possible routes forward.
Jules, I don't have an answer for you on doing clomid after IVF. I have always assumed that we try treatments in ascending order of invasiveness. If clomid is going to work for you, it is statistically much more likely to work in the first 6 months, so I can't see what benefit there'd be in going back to it if you've already done that 6 months and moved on to IVF. But I would recommend you talk it through with a medical professional.
One word of warning on IVF. My local NHS trust will not put you on their IVF waiting list until you've been trying for two years, and then will keep you on the waiting list a further 2 years before you get the IVF treatment (because some couples will conceive naturally in that time). So it's worth finding out what your position is with your consultant - you might be able to do some IUI cycles whilst you're waiting, if you have a wait anything like that.
The other option is to go private (which is what I'm doing), but IVF is not cheap. I've been told to expect £5,000 - £7,000 per cycle.
Hope this information helps you ladies, and I hope the clomid works for you before you have to get into anything more invasive!
Hugs,
Artoo.