Miss,
I know exactly what you're talking about!! I feel dizzy, nauseous, tense, "on edge", have hazy and blurred vision, etc. pretty much everyday all day. The only time that I feel normal is when I am really busy because I don't have time to focus on anything. I am not sure if it's the same for you but it happens like that for me. Problem is, you can't stay busy constantly and then your minds wanders to all the "what if" and "could be" things that might be wrong. In any case, you aren't alone and I am praying the lexapro helps me get better. Keep me posted ;p