I started taking 10Mil. of Coreg about 2 1/2 weeks ago , I am having severe difficult breathing , cannot get a deep breath and having bad panic attacks . I called my Cardo Doctor but he is out of the country , so I called my primary physician and he switch me to 3.125 mil tablets but the breathing isn't getting any better and I am afraid I will not be able to keep going on much longer without hurting my health . Can I stop taking this altogetehr until I can get into my cardo doctor ? I am very scared !!