I have not withdrawn from Zoloft specifically, but did withdraw after quitting Cymbalta cold turkey. It took 2 weeks before the major symptoms stopped (the electric zap sensations, the horrible flu-like feelings (including the dizziness), and the increased depression) It took a month or two before i really felt "normal" again.
Honestly, it took me a few tries to be able to quit. The first few times i tried, but the depression and sickness overwhelmed me and when i called my doctor, they said that the depression was obviously "proof" that I needed my meds! (Increased depression is a common and well known withdrawal symptom, and its temporary) the last time a few things got me through it- my therapist was on board (although he would have preferred I'd tapered my dose) and gave me support when I felt like giving up, at the time i wasn't working and i have no kids, so i could curl up in bed until the symptoms passed, and i lost my insurance so I couldn't just run off to the pharmacy and refill (too expensive, could have gotten them free from my doctor but managed to resist)
I'm afraid i didn't use any supplements or OTC drugs to help me quit so I can't help you there. I do know that there are several websites dedicated to withdrawal from antidepressants though, and someone on one of those may be able to give you some ideas. You could also try tapering your dose. I don't know if they come in smaller doses, but sometimes the doctor can call in for the pharmacy to formulate it at a lower dosage. It takes much longer to withdraw by tapering off your dose gradually, but its also safer and you by pass most of the withdrawal symptoms.
I would think that you've already made it a week, I would expect you should feel better in three weeks time but everyone reacts differently. You seem rather sensitive to the drug, so what has been the case for most people may not be the case for you. I hope it goes away soon, I know its really hard. Hang in there. -Neb