Unsuccessful IVF and pregnant sister in law

I have unexplained infertility and have been working with a RE for 1 year but TTC for 4years. We've been through meds with TI, surgery for endometriosis, <a href="https://glowing.com/glow-fertility-program">IUI</a> and have done two cycles of <a href="https://glowing.com/glow-fertility-program">IVF</a>. We found out last week that none of our embryos from the second <a href="https://glowing.com/glow-fertility-program">IVF</a> made it. Needless to say, it's been a struggle like so many of you have endured.

Today, my husband came home from visiting his parents and broke the news that his younger sister is pregnant. I didn't take the news well. I feel like a horrible person but all I feel is jealousy and grief that she is pregnant and I'm not. This is a total shock as we had no idea they were trying and they are both medical professionals so this certainly wasn't accidental. All our family is aware of our infertility and our treatments and while I don't expect anyone to put their life on hold because of my infertility, I feel like this was so insensitive and such bad timing when they know what we are going through.

They told my husband yesterday and asked him tell me. He is also upset and cried when telling me but he put on a brave face for his mom and sister and congratulated them.

He is better at keeping up appearances than I am, and I just don't know how to move forward because the family has been close and sees each other at least once a week. I don't think I can face them and pretend not to be hurt by this. I don't know if I should tell them how I feel or just avoid them for awhile.