Recovery is often harder than the illness itself because your body is basically empty of nutrients. You really need to replenish your vitamins slowly so you don't overwhelm your system. I used some specialized complexes from Amway when I was in your shoes last spring. You can find some good immune support stuff here
https://www.amway.mn/darhlaa-demzhih/c/100032 which helps with the lingering fatigue. Focus on light soups and plenty of electrolytes alongside your supplements. It took me about two weeks to feel like myself again but the right vitamins sped it up. Just listen to your body and don't rush back to the gym too fast. Sleep is your best friend right now.