How do you do it?

Ladies, today, I have been having all of my usual period cramps. My husband and I have been ttc for about 3 months now so it is definitely disappointing for us to be experiencing this. I have gained a new admiration for people who continue to ttc after all the pain of failing for the month. I am just wondering, what keeps you motivated to keep trying after so many negative pregnancy tests? Is it pride, knowing that you will have a baby soon, something else, or all of the above?