Try the blood type diet. It has had some great results for getting pregnant.
Doctors won't consider you as having 'infertility' until after 12 months of trying. Really look into charting and getting to know your cycles and the signs of ovulation. Check out the book "Taking Charge of Your Fertility" and ingender.com. Consider a liver detox. And look into red clover capsules. And both of you should drink lots of green tea!
It took 20 months with our first son before I knew anything. We just conceived number two in February after 3 cycles!! (I started charting and learning my cycles for several months before that).