Im 26 and been ttc since feb 07, with no luck. I have a hypothyroid which is under control and my doctor said to stop stressing so much, relax.3 couples we know have gotten preggo and 2 were on birthcontrol and weren't really ready. Which made me upset because she was like I guess we will be old and boring now, I was so mad. I just relized that I'll need to relax, take care of myself (vitamins, eat right and get good sleep), and not let others bother me. Its real hard when you see them getting bigger and you have nothing.
I would recommend getting a full GYN work up including thyroid function testing because its one of the number one reasons for infertililty
amanda