What to do after the mixture and injection?

[Schwarze Pest]

Guys i need help.

After i mixed this mixture and injected into me the voice of my head transfers into the dead body. How do i get rid off him?

I'm to scared to push that box from the door away to get out because i think he will chasing me. Or will he stop chasing me when i completely leave the examination room (when the loading screen appears and so on)?

If the answer is yes, what must i do after all?