Take the time you need to grieve. There's no right amount everyone deals with things differently. Try for a little of time to spend time with your other child . You lost a child , but to your child that's here they lost a sibling and a parent. Even though you are still on this earth if you are just sleeping all the time the child that is still here is suffering because they don't have you. Maybe if you don't feel like getting up ask that child if they want to cuddle,read a book, watch a show on tv, even just talk. You will get out of bed one day when you feel ready,but for now try to do little things. ❤️