I read your last thread, but this is my first comment.
Addicts miss the substance that ruined their lives when they give it up too. is absolutley true.
The hurt will change shape, come and go, and eventually retreat to the back of your mind and will occasionally pop up when you see or hear something reminiscent of the past. At which point you'll have a small jolt followed by a rush of relief that things are not like that any more.
My counsellor often said 'Be kind to yourself ' and she's right. You have just done a huge thing and will be physically and mentally drained. If the only things you do for the next week are to stay no contact and eat, you'll be doing bloody well.
Allow yourself to rest and recuperate - might take weeks,might take months. It doesn't matter. This period is an investment in your future. All of the years of freedom ahead are worth it.
You can do this - you already are!