I don't really talk about this but I lost my older brother a few months back, so I can understand what you must be feeling. Honestly I just felt numb after, its hard to describe. I've never been that great at dealing with my emotions, I just tend to bury my head in the sand, I've always been that way.
The hardest thing has been watching my parents deal with what no parent should ever have to deal with. No parent should have to bury their child.
I don't think that there is any set way to grieve so just give yourself time. Time is a great healer.
When and if you feel you are ready, come back and all of your supporters myself included will be here with open arms.