Hi Sophie. I was prescribed 10mg Celexa daily to start the first week, and then 20mg daily. I wouldn't exactly call it anxiety, but I was very jittery and physically restless, like I couldn't sit still in my chair at all. I also had nausea the first several weeks and fatigue, to which I became accustomed and simply went to bed earlier to get more hours of sleep. Sorry, I haven't tried Xanax. I have yet to try Zoloft for anxiety and irritability. My obgyn keeps pushing me on it, but for some reason I am resisting her. Good luck with finding the right medication.