Wouldloveabubba, can I ask why you're trying IUI now when you previously tried IVF? Most people do it the other way around as far as I know...
As far as I'm aware, if you're not using donor sperm you're advised to BD as well as get the IUI, and if you've got a standard-ish 28/30 day cycle you'll be most fertile around day 13-15... So I'd be starting to BD in earnest about 4/5 days from now if today's day 9. Please someone correct me if my info's off!