Feeling defeated

Have you ever gotten to the point that you stop trying to pay too much attention to getting pregnant? Now I just pay attention when my ovulation week is and do the Bd on some of those days. I don't expect a positive anymore and try not to test early to not get too disappointed. I will have been trying one year December. I don't know what else to do to enhance my chances of conceiving. I am 30 and healthy. I don't know why it is taking this long since the last 2 times I got pregnant within 6 months. I exercise regularly and eat somewhat healthy. I am a nurse and deal with stress regularly.  What else can I do to increase my chances?