Lung biopsy

Ok I am having surgery next Thursday-open lung biopsy.  Supposedly I will be in the hospital for 1-2 days.  Have a chest tube, foley catheter, an iv, and an epidural etc.  I continue to be very nervous.  I truly am afraid that I will not be able to breath somehow and have a panic attack. Maybe I will die.  No one knows what is wrong with me!  Bronchodilators nor oxygen help me.  What will they do when I can't breathe?  Yuck