That sounds like a lot of alcohol for me and im around your age, 6'3" and 270! Just do whatever you can to not relapse! Least is right, it will get worse every time! Crawl yourself to the ER before you take that drink.
I hope you feel better and make sure to drink plenty of water during this if your going to try and bare through it. I was lucky to only experience 3 nights of restlessness, some night sweats, and a racing mind that just wouldn't shut up! lol. I am a week in sobriety and feel great! I'm still in that puppy love stage where a drink still feels like 0.0 fun.
D