My SIL is pregnant 😭

My husband and I have been trying for a while now to have a baby. I'm about to start my 4th round with clomid. I just read on Facebook that my Sister in law is pregnant. 😭 she's not married, she still lives with my husbands mom, and she wasn't even trying. I know I should be happy for her but I'm just so upset. My feelings are hurt and I'm sooooo jealous 😢