When does it get easier?

We’ve been TTC for 2 years now, no luck.... every time I find out someone is pregnant I tell myself “this is the last time you’ll be sad, it’ll get easier”...:. But I just found a 4th coworker is pregnant and my heart just feels so blue. I try not to let if effect me but when I hear these girls talk about how they weren’t trying, or they don’t want to be pregnant... I just sit their in silence. Just thinking about the number of pregnant tests I’ve taken, temping every morning, OPKs, the TWW.... and they weren’t trying. I even tried not trying but my body doesn’t want a baby. And it breaks my heart.