Hospitals have grief groups to help in this situation. Just call around until you find one. I've gone to 2 different groups at a hospital here. One taught about the stages of grief, what to expect, and ways of dealing with it. The other was purely a support group. Each of us talked about whatever we wanted to talk about.
I also suggest that you get a book on grief so that you'll understand the process and know better what to expect. If you find a group that teaches they will refer you to books.
My cousin died mid March. I spent he first few weeks wondering why I wasn't upset, wasn't crying, didn't feel much differently than I usually do. Then, mid May, I realize, "hey, he really isn't coming back." I realized that even tho I didn't feel numb I was in a numb sort of stage. A part of me was unconsciously refusing to admit that this was permanent.
I urge you to get grief counseling. It will help you to have someone who isn't going thru grief to talk with.
I cannot imagine dealing with the death of my child at any age but at 2; that seems even more painful if that's possible. I suggest that you may want to also talk with your doctor before this really hits home and feels overwhelming. There is medication to help take the edge off so that you can deal with the pain. Taking something short term, only once you're feeling out of control, can be very helpful. You don't want to get rid of the pain. The goal is to reduce the pain enough that you can think as well as feel.
Know that you may reach the stage during which you will want to cry all of the time. That is OK. Let yourself grieve in any way that comes to you.