Need help understanding ECG and concerns with my heart

I am not sure how to read my EKG or( ECG).
But it is normal the Doctor said. but the Doctor is also sending me for a stress test .
I have heart disease in my family and my brother had a hart attack around my age also my father came up with hart problems at my age in witch the Doctor said that is unusual.
but I am worried do to I am having a lot of chest discomfort and shortness of breath tingling in hands dizzy also nausea ,headaches and this happen a few times a day some times and it seams to be happening more and more.
I am very concerned I am 33 and have young children.
my brother was in his early 30's
so it can happen. I am stopping smoking today.

my resolutes are
Vent. rate : 93 bpm
RR interval : 643 ms
PR interval : 154 ms
QRS Duration : 102 ms
QT interval : 360 ms
QTc interval : 417 ms
QT Dispersion : 36 ms
P-R-T AXIS : 55 69 26
If so one knows how to read this and would not mind explaining this to me that would be so helpful .

Thanks
Christine

[kenkeith]

PR interval is normal.  Normally between 120 and 200 ms.

The QRS complex is normally less than 100 ms seconds in length. Lengthening of the QRS indicates some blockage of the electrical action in the conducting system. This may be due to ischemia, necrosis of the conducting tissue, electrolyte abnormality, or hypothermia.  Can rule out as there is no other evidence and doctor states normal.

At normal heart rates, QT length is abnormal if it’s greater than 400 ms.  RR interval and 93 bpm indicates a normal heart rate.

QTc is the QT wave interval divided by heart rate and within normal range.

P-R-T AXIS indicates the heart orientation is normal.