Hi, I have had anxiety problems for a few years. My Dr. gave me xanax, .25mg, 2x a day. I have been taking this on and off for over a year. I asked to take it 3 times daily, and he said it is habit forming, and suggested zoloft. I took 25 mg. the first day, but I was so shakey, weak, dizzy, and headache. Day 2 I took 12.5 mg. I am now on day 7of 12.5 mg, and .25mg xanax in the morning. As soon as I wake up, Iget weak and dizzy and my heart pounds. I take both meds and feel semi ok until around2pm. My heart pounds and I shake inside and my stomach hurts. At 5pm I take ,25mg xanax, and the pounding subsides. Are these side effects from the zoloft or xanax withdrawl? Tomorrow I am supposed to up my zoloft, but I'm afraid symptoms will get worse. Please help! cindy