Generally, the physical part of withdrawals is over in about 5 or 6 days. Usually by Day 7 you would begin to feel better.
You said you talked to people at work about your drinking and they gave you information to help. I would caution you to think seriously before you talk about this at work. Understandably, if you go into rehab, you will need time off work and you will have to tell your employer. But, if you do an Outpatient program you could likely go outside of work hours. The main thing is to stop drinking of course, but if you want/need to keep your job, be careful what you say.