How to conceive when you're SO is being stubborn!!!

This is driving me insane! We have been ttc for almost 5 months now and I feel we actually tried for about 2 because my hd doesn't like to have sex unless its in the moment and once every two weeks if that, I am trying to make him understand if we want a child we have to get busy a lot more times and on specific days that I am most fertile but he refuses it...I don't know if its the pressure or what but I want a child as soon as I can, and I want to feel like I tried my best every month. What can I do?!!!!! It's frustrating and depressing and all I do is cry.