If Michael was sick but didn't tell anyone for 2 weeks (read description)

In my AU Goldie(Nightmare Fredbear), Nightmare Chica and Nightmare are possessed. Nightmares soul name is Tyler he was Chris' best friend from childhood. Goldie's soul name is Caleb, he used to bully Chris and Tyler(Nightmare). And Nightmare Chica's name is Sally, she bullied Chris and Tyler(Nightmare) with Caleb(Goldie). Caleb died because his mother stabbed him and and Sally died because she got in a car crash with her father. And after Clara, Chris and Liz died William started to kill kids and Mike started to run away from him but Will thought Mike was insane so he put him in a mental hospital that did experiments on Mike and they made his pupils change colour to his emotions or feelings. Mike was in the mental hospital for 25 years, but when he was free William was dead and Mike got the job at circus baby's pizza world to try save Elizabeth but he ended up dying from Ennard in the end.