It's hard to see pictures of my step son as a baby....

I love to see him as an infant but it's getting harder because it's reminder of my struggle. It's hard to see pictures of my husbands ex wife pregnant with him as well because it only took her about 4 months to concieve. (We don't look at them often but they come up) I keep telling myself it will be me soon but it's very taxing on my emotional state. Anyone deal with this?