Jealousy!

Been Ttc for six months (been having unprotected sex for two years )with my husband. My brother In laws fiancé  just told me she got an unexpected bfp :-( it's going to be the first grand baby on my husbands side.  Is it sooo wrong that I'm suppeerr jealous?! I want a baby so badly and it seams everyone else is getting preg. On accident! I'm heartbroken and can't stop crying. Am I alone here?