Impact of exercise

I have PCOS that is under control. I am seeing a fertility specialist as well. My BMI is healthy. All other tests including HSG and semen analysis is normal. The only thing is that, my work is so hectic, I barely have time to exercise. Do you think it's a factor I am still not pregnant? Btw, I am 26, DH is 27. Also I have regular cycles that comes every month.