Do you think my echocardiogram will come out abnormal?

Ok so I went to the ER because I had a panic attack so they did an EKG,CHEST XRAY, BLOOD TEST came out normal he even said my cholesterol was exellent and as soon as they told me the good news my heart rate was going down the dr listened to my heart and said it was nomral. So the doctor who was a resident ordered a doppler echocardioam to be done a month and a half from now but im kinda scared they will find something abnormal, I am a 24 year old male 150 pounds.