Mamahawk another pill addict here. I was on Vic's, Percs, oxy...sure WD sucks but it's doable. You probably won't feel your worst until days 2 and 3 but when you think about it it's only two bad days....not much different from catching a flu.....you have the rest of your life to look forward to clean and sober. You never have to go thru this again. TE is right that the fear is worse than the actual WDs. Towards the end of my addiction, I was going thru it every week because of running out of my pills.
If it's possible....try to sleep or rest as much as possible thru those first three days. Everyone is different but I usually felt a marked improvement by days 4 and 5. Make sure you drink lots of water....sports drinks like Gatorade is even better, banana's for potassium will help those leg cramps. I lived in the tub the first 3 days. Hot baths do a marvelous job soothing those aching muscles and greatly reduced those hot/cold sensations. Get ya some DVDs to watch or Netflix. I found comedies were the best for me....since my anxiety and depression were pretty bad. (You know something's wrong when you cry instead of laugh at something funny)
If things get too uncomfortable for you......ask your doctor for something to help with anxiety or insomnia if you can't sleep. Chances are you'll be fine. Like I said before if you really think about it we are talking about 2 or 3 days of feeling really crappy.....not too bad a price to pay to get this monkey off your back!