Struggling with Emotional Regulation at Work

I have a low emotional threshold like it doesn’t take much to cause me to be flooded with emotions like stress anger sadness etc. I work at a dog daycare and there was a fight in my yard (i was the only one in my yard) and I started crying and feeling like I was going crazy and my coworker told me “there’s no room for emotions in this job grow up” but i can’t help it and can’t tell them that it’s a disorder that I have because I would be ridiculed. I guess this was a rant but I’m so stuck