Would you quit your job?

So I work at a hospital, I’m a STNA and am PRN ever since I started I was fine with anxiety etc. Then I had my first shift working with someone who was mean/disrespectful towards me for no reason. Ever sense then, even if I’m not working with them, I get terrible anxiety. I’m only 18 and haven’t experienced bad anxiety like this until now, when I know I work, I think about it for days and it’s all I will think about, keeping me anxious all day. Today I worked, I’m so anxious ever since I left because of the 2 workers who make me nervous. When this happens the anxiety takes hours to go away, even days, and I have no idea what to do. I honestly don’t even know if I want to keep the job because of how it’s been on my mental health, I’ve had two jobs in healthcare before this and have never been nervous or anxious to work. My heart rate has been so high since I left and I am so tense and nervous. What would you do in this situation?