im depressed because im sick

i cant do this anymore ive been thinking about going to the er but im scared they wont tell me anything or they will keep me there for more than a day and i have more exams this week but it hurts so bad i cant function normally i go to the bathroom every hour and i stay there for like 30 mins and i have to shove a cloth in my face not to scream in pain and im shaking. on sunday i had a high fever and a lot of blood. i dont know what to do this is making me go insane and i feel so alone in this