Did my dream about my brother mean something?

I had a dream that I am with my eldest brother for slaughtering (Qurbani) of a goat. I saw my brother holding a knife to slaughter it but unfortunately he was putting the knife on wrong places several times. I remember that I was assisting him by shouting at him to put the knife exactly at the neck (I mean at correct place). I also remember that I wanted to slaughter that goat in place of my brother but I did not show any desire to do so because I feared that my brother will feel bad about it. As the goat was slaughtered I had seen another side of this dream that my brother (same eldest brother) is laying on ground, dead and there was blood all over his neck and some parts of his clothes and I was crying a lot in grief by putting my head on his chest. After this Fajr azan woke me up from this dream. I have written about my brother before (fatwa: B=12/1433/1517-1962). I also did istikharah 4-5 days before this dream for him for his marriage. We got a marriage proposal from a pious family.