Good luck, how high a dose of zoloft are you on and for how long? Are you doing a slow wean or a cold turkey?
I've just done a cold turkey off zoloft but I was on a high dose for a very long time. I'd ask your doctor for some short term meds to ease the withdrawal if it's going to be quick.
What I found was dizziness, muscle aches, stomach upsets, brain tingles and increased anxiety were some of the common things. It all really depends on how the withdrawal is handled though.