I took prozac for 15 days and then skipped one day and started zoloft right after due to awful side effects from prozac . I'm on day 13 of zoloft now. Does this mean I have 28 days worth of seratonin building in my system or does it kind of reset upon switching medications? I'm still not feeling right. I wake up extremely anxious and my head is so clouded. My head gets tired and spacy and I feel hopeless some days. I'm exhausted. Should I give it another 2 weeks? I'm on 50 mg btw.