You could always tell your GP it has been near enough 12 months of TTC. I'm not advocating dishonesty but I know how it feels for these things to take their time when you want it so badly!
By the time you get your referrals, get into a specialist etc it may be getting close to the 12 months anyway! I agree with the others though that charting, OPK's etc are well worth the effort if you haven't tried them yet. Unfortunately I believe for some of us the whole TTC is a numbers game & we just have to keep plodding along until ours come up! That said do what makes you happy & wishing you a speedy BFP with no intervention necessary!