Grieve as you grieve, be true to yourself. I find it disturbing that "Christian" people around you would not be supportive at this time. I do think you should find a group for those who have lost children, and maybe someone just for you so that you can Know that others can be there for you, and understand.
Also, you will find support here. I am so sorry, this is a terrible loss. You need to do what you need to do in order to move on, but you won't "get over" this. It is human to mourn...