Infertility and jealousy

My hubby and I have been struggling with infertility for 3 years, I know our time will come and I finally have an amazing doc who is getting us the help we need. Howeveerrrrrr my sister in law is pregnant, (mind you she has always been so negative about the possibility of her having kids. And not wanting them and blah blah.) and she gave me the invitation to her baby shower today at family dinner and going through her registry and seeing her starting to show and the whole family talk about her and the baby and everything is about her being pregnant. It makes me so jealous. I can’t help it. And None of my hubbys family knows that we’ve been struggling with infertility and none of them know that we’re ttc so that makes it harder. Sooo any tips on how to deal with the jealousy?

Ps I know all this sounds bad and I’m so happy for her that she is blessed with being pregnant and I’m not by any means bitter towards her it’s just hard