Health Risk & Need for Testing

I think I have been in the same place as someone with COVID19. What is my risk?
I think I’m at considerable risk. What should I do now?
I feel that I need to get tested. What can I do?
Will there be consequences for not wearing a mask?
What if I'm feeling sick or I don't feel comfortable attending my on-campus class or hyflex class in-person on the day I'm assigned?