Hello and welcome.
I am sorry to read of your returning anxiety and symptoms. :(
I too thought migraine as I was reading...before I saw that your doctors had also suspected this. Look into getting help for this if your vision and head symptoms persist...it is treatable!
As far as anxiety and worry about
your health go, here are a couple of books that may help you.
http://www.amazon.com/Overcoming-Health-Anxiety-David-Veale/dp/1845298241
http://www.amazon.com/Treating-Health-Anxiety-Cognitive-Behavioral-Approach/dp/1572309989
They come from our Resources, that is full of great self-help ideas on managing anxiety issues. Find it on the main page, 1stp post.
Keep talking with us if you find it helpful. We are here to understand and support anytime!
Scaredy Cat