Findings in ECG. Two other. please help!

Hi doctor, I have been to hospital for annual health check up as i m having head aches from last 15 days after getting a fever.. somehow from last 3 days i m not having any head aches. But when I had my ECG it showed three findings.Doctor checked and said it is normal. I again pointed out the same she checked and said the same again. the findings mentioned are 1) Normal sinus rythm with sinus arrythimia 2) Junctional ST depression probably normal 3)Borderline ECG I just wanted to know why I got these findings. My BP when i went to hospital was 130/80 and i am having dizziness when i am laying down on bed from last 15 days. I had my ECG before many times. all i have seen is normal sinus rythm with sinus arrythimia. but this time i have seen two other. please help