There's your problem. You need to taper slowly off these drugs to avoid withdrawal effects. This could go away in a couple of weeks, but if you want to be safer, you can go back on it and taper off as slowly as you need to.
i was taking 150 mg and i just stopped
Did you go cold turkey? And which dosage were you on? I had nausea and dizziness last time I went off zoloft, even though I tapered off really slowly. Stopping all of a sudden can be dangerous.