Fake it till you make it?!

So me and my husband have been trying to conceive for almost a year now with no luck. No one knows this except a few close friends. Recently, my sister in law, who already has a two year old, announced to the whole family she’s pregnant. I have a very successful career, wonderful husband, great friends. I have no reason to be jealous, but I can’t help but be jealous and have a hard time putting on a happy face in front of everyone. I do not think she knows we’ve been trying but she’s very condescending about the fact she has children and I don’t. I have to go on vacation for a week with her and the rest of the family. I need prayers y’all!!!