Jealousy advice?

My husband and I have been married for 2 years. We've been TTC for a few months now. My husband's brother got married 6 months ago and already has a baby on the way. Him and his wife got pregnant on their first try. We're really happy for him and his wife, but we also can't help but feel some jealousy. It doesn't help that they announced their pregnancy to the family as soon as they took a pregnancy test and announced it on social media as soon as they got their first ultra sound. It hurts too because they knew we had been trying for a while. My husband and I are having a really hard time with it all. My heart hurts whenever I think about them having a baby. It's hard to be around them sometimes. I hate having all these negative feelings toward people I love so much. Any advice on how to get over this jealousy?