I find that Lexapro helps me with my anxiety, jittery feelings. However, I find that I only need 10mg of it rather than what the doctor recommends, and taking a bigger does mess up your memory. If you know of a better medicine let me know :)
The B Complex Vitamins and Magnesium are essential to handling stress smoothly.
This may help you:
http://www.medhelp.org/posts/Anxiety/Anxiety--Depression--Panic----Magnesium/show/1313099
If the trazodone isn't helping, ask your doctor about generic remeron. No jittery, anxiety with the smallest dosage for most people.
I too take trazadone and find it works well for sleep too. I don't think it does much for my anxiety. You may want to give it 2 more weeks or so to allow it to reach full effectiveness. Otherwise you might want to discuss this further with your doctor. Perhaps adding a medication for anxiety or a different antidepressant to the mix may benefit you.