For a normal couple, it often takes a number of perfectly timed cycles before pregnancy is achieved. The chances of getting pregnant each cycle decreases as you get older. If you are between 20-25, your chance per cycle is about 25%. At 25-30 your chances are about 20%. At 30-35 it is about 15%. After 35 it may be about 10% per ovulatory cycle, and the chances continue with a downward trend.
It's always recommended to take a second opinion with the experts.