As for the above answerer, do not quit taking them abruptly. This will cause even more problems. I've taken Zoloft and never had these side affects, but some bodies react differently than others.
How long ago did you start it? It takes a couple weeks to level out and then the side affects usually go away. Your doctor would know more about it then me.
According to their website the usual side affects are:
What are the most common side effects of Zoloft?
Some people taking Zoloft might have some side effects. The most common Zoloft side effects are dry mouth, insomnia, sexual side effects, diarrhea, nausea, and sleepiness. Not everyone gets side effects.
I think these are just the "main" side affects. Their could be others. I hope you get to feeling better soon!