Hi...I Have Been Diagnosed With PD But Have Only Just

Hi...I have been diagnosed with PD but have only just now consented to start meds but am concerned because I am also experiencing shortness of breath. I've been checked at the ER with chest xray, EKG, blood work ....all negative. Oxygen level 98%. The sensation of not getting enough air is scary and causes anxiety. With this latest issue I'm reluctant to complicate matters by starting PD meds, especially with possible side effects. Any suggestions? Thanks!