Severe anxiety

I have had anxiety and panic attacks for 17yrs now but lately the anxiety and panic has taken my life over totally, i am anxious all the time and then it rises up into panic, i feel sick, dizzy, weak, hard to breathe, sensitive ears, tired and shaky. I went to my doctor and she said its definetly anxiety but why won't it go away, every day i am so afraid of taking another panic attack. I even wake up in a panic and really anxious. I just wondered does anyone else feel like this and is it possible for it to get this bad so quickly.