23Female, with 39male. Trying for first child.

Hi, I'm 24 years old and my hubby is 39. We are wanting to have an child. My cycles have always not been regular... I can bleed 2-4 days one month then miss two months.. I have lost an child when I was young, pray for my baby angel. Now I'm ready to give life to another. My hubby has no children, this would be his first also. We had sex a lot to get pregnant, now romance is gone and not willing because it upsets we are not pregnant yet.. How and what can I do to help my body to want to be pregnant, and help him ej proper.