Confused on what to do?

On the very first day of work, I cut my thumb on the job. (Almost to the bone) My boss took me into the bathroom and asked me if I wanted to continue working or go to the ER as a band. He also asked me if I could keep it for myself and if I had insurance. (Because in the company the amount of other worker comp cases was high and the insurer could drop him. So I used my own insurer and went to the ER. Then in two days, he pressed me to come back to work and my thumb got so contaminated that I was placed back with iv antibiotics in the hospital. I came back to work and did stuff to make me leave and make me look retarded and unable to do work