Not Prego

Hi ladies, I’m back and I’m not pregnant! We’ve been trying for the past 4 months and nothing. I’ve already gone to my doctor and he said that I’m very fertile. My husband has yet to go and get tested. However, I have a question. We don’t have a lot of sex. AT ALL. Since we started the baby making process, we only have sex during ovulation, so that 3 times a month. Could that be why I’m not? Should we be having lots more sex? We seriously can’t put it in our schedule. We both work long hours and our days are off. 😩