Everyone's experiences are different, so it's hard to predict what it will be like for you. I was able to continue working, though it was hard. I had shaking, feeling sick and insomnia for about a week or so. I was in a mental fog for a while after that, but I managed to hide it or excuse it away. My insomnia has continued but that isn't to do with withdrawal, and I'm getting help with that.
That's just my experience. Your doctor really is the best person to talk to. You must be completely honest with him/her and if you're at all worried, please go back x