HI Well come to HCM I really appreciate your concern, you are thinking in wrong way because there may not be anything wrong with you because pregnancy is more natural phenomenon than physiological one, and it depends upon certain incompatibilities like presence of sperm and ovum at the time of coitus, with proper quantity of hormones let me tell you some fact that even after everything are normal conception not happening and some time with some obvious abnormalities conception happens, in my opinion first of all better get done the semen analysis and ovulation studies, hope this information helps, take care and have a nice day.