Do these abnormalities in my 2 ecgs explain my chest pain?

[Yazzy77]

I’m a 19 year old spec with Chest pain that spreads to upper back and sometimes left arm dismissed as anxiety by doctors despite a normal psychiatric evaluation with no diagnosis found. My first ecg during chest pain showed ‘irregularly irregular rhythm’ with a sinus arrhythmia, short PR interval and ST junctions depression non-specific. My second one during chest pain 3 days later showed TWI in V2 and V3. A week after my second one when chest pains resolved (the come and go every few days) my ecg showed PACs.

I do have bouts of random sinus tachycardia throughout the day with no cause or trigger. Could those abnormalities in my 2 ecgs explain my chest pain or are they completely benign?