Stress probably has a minimal impact on a women's ability to get pregnant. Studies have shown that elite athletes and women with low female hormone production (eating disorders, low weight issues) activate their stress hormones, which can have an impact on their ability to release an egg. However, normal day to day stress may not have as much of an impact on your ability to conceive. Usually stressful situations are short term and don't have an on-going effect on your fertility.