If something was giving me diarrhea for a WEEK, I'd stop taking it immediately! You have to research these drugs the shrinks try to give us. They have NO clue about the side effects unless they read it recently. Makes me mad! I hope your panic attacks are better, though, without that drug!
First, withdrawal isn't caused by the drug being in your system, it's caused by the drug not being in your system anymore. These meds cause the brain to work differently than it does naturally, by directing serotonin in the brain to selected receptors and preventing its normal breakdown and evacuation so it can wash in the selected receptors longer. When you stop any ssri other than Prozac, which stays in the system for about a month, most of it is gone within a very short time, and the receptors in the brain that have shut down because the brain sees them as no longer needed because of the drug blocking the flow of serotonin to them start to wake up again. This isn't easy, and it can cause a lot of withdrawal symptoms. These can go away quickly or last a very long time depending on the person. You have an additional problem of being too young for these drugs -- your brain is still developing -- so they are only supposed to be used for you in severe circumstances and only for a short period of time while therapy or time heals the problem. Stopping one of these drugs abruptly is a bad idea, though some will sail through it. It's much safer to taper off of it slowly to minimize withdrawal by allowing the brain to adapt as slowly as it needs to with a taper suited to how you're reacting. Second, these drugs almost never solve all our problems. We still get nauseous sometimes. We still get anxious sometimes. Life goes on. Nausea doesn't cause your panic attacks, the way you think does, but it's interesting your doctors haven't tried to figure out why you're getting nausea so often unless it's only been since you've been on the drug that it's been happening. Before I ever got an anxiety problem I got nausea a lot -- kids often do -- but it never made me anxious. Anxiety is a way of thinking about things. We seldom know why we get that way, but when we do, we change, and things that didn't used to scare us do. Now, your psychiatrist is the one you should be consulting if you want to stop the med -- he or she should be informed about how to do it safely and whether you're ready for it. Some of them aren't so hot, so you have to be aware of this and not lose your critical thinking when you see a doctor, but they do this a lot. Regular docs, if that's who is doing this, don't do it as often and don't study the drugs as much, and so aren't as good at it generally. And I'm wondering if you're in therapy and if anyone sent you to therapy before putting you on medication at such a young age. Peace.