22yo F alcoholic trying to quit cold turkey. Any advice?

I started drinking around 16 or so but it wasn’t nearly this bad. It started getting concerning when i was 19 or so. Knocking down 2-3 tall boys a day, buzzballs, then it turned into a bottle in 2 days. I lost my dad and im not the best at handling grief so in the last 2 years I don’t think there has been a day where i didn’t drink a pint or 80% of my handle and it’s gotten severe to the point where by 3pm ive already killed a pint and a half and im fully functional and nobody notices im loaded. I wake up with empty pints and bottles all over my bed and sitting on my desk and one day i woke up and felt so ashamed and grossed out by myself but i can’t stop. i had a bad scare a couple weeks ago and when they took my blood my BAC was insane i shouldn’t have even been able to stand let alone talk but i felt absolutely fine. They could tell immediately that im a regular alcoholic so i was prescribed naltrexone. I promised myself id start today and its been rough. within 2 hours of waking up i got the shakes, i tried to drink some water and everything went downhill from there. My body immediately rejected the water and i started throwing up green and yellow bile. The cravings are gone completely it’s been almost 24 hours with no liquor but the anxiety and buzzing in my head is making it difficult to stay attentive, i feel like nothing makes sense when i speak. I can’t hold down any food, and im still breaking out in sweats but its calmed down now. I dont want anything bad to happen, i have 2 emergency shots just in case but im scared and i dont want to push myself it could be dangerous. any advice on how to handle the next couple of days?