I have detoxed several times. Sometimes with Valium and sometimes without. I can say from experience without the meds you will climb up the walls!
You'll scratch your skin until it's scabby. Sweat so much your bed will be drenched. Shake so much you cant hold a glass. You wont sleep at all and if you do it will be filled with nightmares. Your pulse will go to 100 at rest. You won't be able to eat. There will be ants crawling on your skin. You will see things in the corner of your eye that aren't there. And you will hear a strange "WOOOH WOOOH WOOOH" in one of your ears.