Dont want to get stuck on meds

Well first I want to say thank you to everyone who is helping me through this time! Ive got alot of different issues going on, but as you all know I just started zoloft(lustral). I think my fears of taking it are becuase its almost like I feel a loss of control by taking it. Ive now taken my 9th dose and today I woke up scared becuase I know I cant turn back. I have read about the withdrawl symptoms of these drugs and im worried about it. What if I get two more weeks into it this drug and it doesnt work? Will I be forever trapped in the cycle of meds? Will I feel worse then before I started taking it? Ive desperatly wanted to hear success stories with drug or other ssris and I have looked in the archives but havent seen much success. It seems like everyday Ive taken this med Ive come up with another reason to worry about it. I want to get out of this cycle of worry but I just cant. Can anyone put my mind at ease??? Chrissy