My period is late by 54 days!!!!

Erin

So this is my first year having my period and my last period was in September. I recently became a pescatarian and started eating better. Should I be worry? My friend was 5 months late and she was fine. Btw there’s no way I’m pregnant. It has almost always been regular before this. I’ve had spotting but no actual blood. Has anyone experienced anything like this??