It is OK to feel any which way after losing your child. There is no specific way to grieve or no length of time by which it should be done, if ever. No one should (unfortunately they will) tell you how to be or cope.
If you want to scream at everything then do so or if you want to hide from the world then go ahead.
Any and all feelings are valid. There is no manual on child loss.
I spent many days in my bed not talking, eating, drinking in the early days. I refused to open the door or answer texts. That was my way of dealing with the pain. It wasn’t necessary the most healthy way to do it but it was my way.