Been there, not fun, took me a month to get over it. If it's just starting for you, expect that for another 2-3 days, you'll still feel like shit, but you'll feel much better than you do now which you will treat as being cured by comparison. Then you'll notice you still lack energy, and feel something in your chest, that's your lungs filling with fluid reducing the oxygen saturation in your blood, forcing your heart to pump faster. Naturally other parts of your body will be taxed, it is crucial that you drink plenty of fluids, that they have electrolytes as your liver and kidneys are being taxed to both purify the blood, and eliminate waste. Your appetite will go away, this is to make your body go into a fasting state, this is much like a fever, because when you go into a fasting state you produce more HGH(human growth hormone). A good electrolyte drink is 1/20tsp of salt 1 tbsp. of lemon juice into 16fl oz of water. No sugar and will keep you hydrated, drink as much as you can stand. Once you recover your appetite, make sure you don't go crazy trying to regain weight, it'll come back naturally. It's easy to overshoot. With luck you won't have diarrhea or other digestive issues like literally shitting blood, that's something I had to deal with. I also felt like absolute dogshit, and it's been 5 weeks since 1st symptoms, I would say I'm 98% back to normal. However, I'm 38 and maybe I'm just noticing my slow decline, I figure I'm about due for a mid-life crisis. Anyway, hang in there, you'll make it, once you pull through you'll be immune. Eventually you will get better, I have faith in you.