my brother died and i dont feel anything?

So my brother commited suicide, almost a month ago
And i dont feel anything,

when I found out I was surprised but not sad.
Since then I have lived my days as if nothing had happened.
The smart ones say "I'm not empathetic" and all that, but I just know that this is life, now I could cry and nothing would change, so I ask why should I be sad about nothing?
Is it just me? Is there a problem with me?
Normally I wouldn't give a shit, but so many of my relatives and friends tease me that "you're not normal" and all that shit that I'm starting to wonder if I'm normal thats why i asked it