What are the differences between symptoms anxiety and brain tumor?

Odds are you are just fine, your fear of having a brain tumor is probably whats causing your anxiety/panic attacks... Many people who start thinking they have a disease cause anxiety in theirselves, and nothing is physically wrong with them... P.S. stay off the internet for med. advice, you'll think you need an amputation for an ingrown toenail if you keep looking at stuff too long, you'll make yourself crazy

You were diagnosed with anxiety (disorder?) but what have you done about it since then? Are you seeing a therapist? Are you on anxiolytics? Anxiety can do odd things to a person. With the help of a competent therapist, either LCSW or pshychologist, you can identify the sources of your anxiety, the triggers and learn the techniques to control it. Finding a therapist should be your first priority.