I'm sorry you are feeling so much pain today. Its normal of course. If you didn't feel the pain, you wouldn't be you.
How to deal with it? Be patient with yourself. You are going thru a whole lot of changes now and are facing more as time goes on. Don't put unreasona ble expectations on yourself. You are not superwoman. None of us are. Make plans and lists of what needs to be done when. Allow yourself to feel the emotions that come along. And know that in the end, you will come to a better place.