Well I was going to comment along the lines of what was said above but also have you had withdrawal symptoms? As they can be worse when a medication is abruptly stopped. I have a friend who only missed one dose and had the worst withdrawal symptoms.
It's bad to come off a med, then go back on, then off again. So if you are going what you would call better then maybe stay off it.
Definetly go to your doctor and/or psychologist/psychiatrist about this.
Well, if you don't want to go back on it, then don't, however, you really should discuss these kinds of things with your doctor first. I'm not sure how long you were on the Zoloft, but it shouldn't be abruptly stopped, it should be tapered under the supervision of a doctor.
Why did you miss a whole week? Why do you not want to stay on it? Was it not working? How long were you on it at what dose? Are you addressing your depression any other way? Therapy?