I'm on day 18 of 20mg... of fluoxetine..I'm having so much anxiety and panic..the only thing that calms me is .25mg of xanax..Are these symptoms normal?will they go away... how much longer..My spychiatrist tells not to take the xanax as its bad... I don't know what to do.I can't be at work like this..weak legs.arms..shaky..can't breath..