Rant from job

So today was just awful. I am a opener at Dunkin Donuts and I was there from 4:30-6:00 all by myself. My other opener didn’t come in. And from the start I didn’t feel comfortable opening all by myself. I get everything I was able to ready for when my manager comes in. As she arrives she’s mad at me because I didn’t have a headset on. I responded with “well I’m here alone” and she’s like “well I know but you should still have one on”. She then proceeded to ask why I have nothing done. And while I was there by myself until 6:00 I was having a panic attack in the back texting my mother in tears because I didn’t know what to do. And for the rest of my shift I’ve been shitted on by my boss because apparently “I was making her and the opener (who wasn’t in trouble at all and might get employee of the month) do all the work”. When I got home all I did was go to my room and cry and I seriously want to quit but my mother doesn’t seem like I should be quitting over this. What’s is everyone’s thoughts on this situation?