Hi Lizzy! Infertility is defined as one year of unprotected intercourse without conception. If I were you, I would make an appointment with a fertility specialist, especially if you have been mointoring your ferility signs. If you have any temp charts, etc., take it with you to your appointment. Most physicians find this helpful, of course, you can always ask when you make the appointment.
If you don't already own it, you may opt to purchase the book "Taking Charge of Your Fertility" by Toni Weschler. This book is very helpful regarding the signs of fertility, so you can properly time intercourse. This author recommends considering testing and treatment if you have not concieved after 4 to 6 cycles of properly timed intercourse.
I have been down the infertility road twice. The second time... I sought treatment after only 4 cycles of unprotected intercourse during my most fertile time. I had miscarried in October and in March had not conceived despite properly timed intercourse. I am thankful I did not delay this, because there were a few problem that were easily fixed. Please remember, that was my experience and you must do what is best for you.
Good luck and keep us posted!
Autumn