3 month old baby won’t stop crying!!

Sh

I’m currently baby sitting my sister in law, it’s 1:09am and she won’t stop crying, she’s like screaming to the point where she coughs, whenever I settle her she does the same thing in 5 minutes!!! I’m going crazy please HELP definitely killed my baby fever

She’s not hungry cos she won’t take food and I know damn well she’s tired but she’s trying her best not to sleep I swear