I want to know if this is indeed anxiety or a symptom of another illness... which then exacerbates my health anxiety! 

I recently had my blood tested twice and was cleared twice, but I'm still experiencing anxiety symptoms.

For a long time I thought that anxiety only happens in response to your thoughts. Say, if you were the type to be actively worrying about something in particular, this is when the anxiety comes and you are unable to break the spiral.

BUT I currently find that I also get symptoms of anxiety when I am not worrying about anything at all. Like when I am trying to read or play games and not be worried about anything. I suddenly get it with sensations of sweaty cold palms, irritability, even a little dizziness.

Has anyone else had this? Again I should stress I get these symptoms when I am not worrying about something or ruminating.