Someone with knowledge..help?

I've been diagnosed with gad..anxiety disorder but can anxiety be 24/7?????. From the moment I wake up I'm dizzy and can't concentrate on anything, I'm overly fatigue I can barely function then I start freaking out that I'm dying and start feeling lightheaded and shaky. I just started prozac but i can't seem to get myself back to normal. I feel inhuman and in a word where I don't exist. Idk if this is all anxiety or a health issue. I'm vry scared.