Am I wrong to feel this way?

I am just so I dunno what I feel, but this month I really thought we were gonna get a BFP but no such luck, just another BFN, but on the same day I was let down again, my MIL calls to tell me that my 16 yr old SIL has gotten pregnant! I feel like I have been slapped in the face and it is making me crazy, I don't want to be jealous but subconciously I think I am I cant help but think why does she deserve to have a baby more than I do, she doesnt even want this and I want nothing else it just makes me so upset I dont know how to feel, Thanks to everyone for listening I guess maybe i am a bad SIL but it still hurt me. Thanks again