I also went through the same thing a few weeks ago. It helped me to take something to make me sleep through the worst of the w/d's. Also an otc pain killer, or a mild rx for the pains.
It's awful, but you can do it! It helps to do this every now and then, to reduce your tolerance for them so you don't have to take so much to help.
pm me if you need someone to talk to. Sometimes it helps to talk to someone who's been there