I have trouble breathing just lying on my side, where my breathing becomes rapid and I have to take three deep breaths to calm it down. I am worried?

Rapid breathing on l. shortness of breath on lying on side May be caused by anxiety,congestive heart failure,copd,cad,pe,infection of lung,pleurisy,costochondritis diagnostic tests:cbc,chem screen 24,X-ray chest,ct chest with pe protocol,EKG,echo,pft Treat the cause,xanax (alprazolam) etc.