Starting an internship, and I’m sick

I start an internship tomorrow, but I’ve been sick since Wednesday. I tested negative for strep so I figured it was a viral infection. I’ve been trying to rest and drink lots of fluids. I felt better yesterday but today I feel a worse. I feel lightheaded, weak, and I have an awful cough with green mucus. I don’t know what to do about the internship, I don’t want to get anyone sick, but I also fell I have a responsibility to show up. I don’t know if I’m even contagious. And I really don’t want to miss out on it because I am super excited to do it (it’s at a coroner’s office).

I guess I’m feeling really guilty bc I’ve been sleeping so much. I hate feeling like I’m wasting my life even though I am sick.

What should I do?

Thank you