TTC ISSUES

My husband and I have been TTC our second child for about 18 months now. We had no problem with our first considering I was on BC when we conceived her. This time around has been so stressful and frustrating. I am taking prenatal vitamins to try and help the process, I excercise and eat right. Hardly ever drink and we always try 2 days before, on ovulation day and a day after. Idk what else to do!