Persistent anxiety symptoms and conditions

I have been taking Wellbutrin 300 XL for a little over a year. My doctor had prescribed it for my persistent anxiety. In general, I felt overwhelmed by the extent of the daily duties I had imposed on myself (which was always more than I could possibly acheive). For the first few months I felt great. I was much more relaxed and focused and the only side effect I experienced was a slight ringing in the ears. But after my third or fourth month on this medication the ringing in my ears grew progressively worse and I started noticing other side effects. I began having recurrent headaches (which, at 33 years of age, I had never before experienced) as well as fatigue, achiness, dizziness, and insomnia. In the past month I have begun to experience tremors and twitching. I tend to feel as though I am jerking my head or hands when I initiate movement and my eyes twitch almost incessantly (which is extremely distracting). The ringing in my ears seems to grow louder each day and my worsening insomnia only intensifies my fatigue and achiness. I have also noticed those old feelings of being anxious and overwhelmed creeping back in. Wellbutrin seems ideal in the short run but over time its benefits begin to wear off while side effects continue to manifest and become more pronounced. My advice to anyone considering taking this drug would be to start on the lowest dose possible and maintain an awareness of the side effects as they appear.