How do you stop

How do you stop obsessing over ttc? I am just about to the end of my rope. I'm so tired of being sad and miserable. I want to be happy for my friends and family that are pregnant, but it just makes me so upset and feel so broken inside. I know it takes time to get over a miscarriage, but it just seems like every time I think I might actually be able to feel happy someone else is pregnant and due when I was. I'm just so discouraged and ready to be happy. I'm so thankful I have my husband who is very supportive, he just doesn't quite understand my pain.