You are in the phase of post covid syndrome. You need adequate hydration, meditation, yoga, deep breathing exercises. Please do things that you enjoy in leisure time. Eventually you will recover from this phase. It all needs a little bit of patience

Kindly discuss for your concern

Hi, the weakness is probably just something most people feel while on the road to recovery from Covid. It's good that you're feeling hungry, you should take advantage of that and have as much nutritious food as you can eat, in order to give your body the fuel to properly heal. As for the vitamins, you can continue taking them. In addition, go easy on your exertion if there's any and give yourself good opportunities to rest. Don't over indulge in physical activity to the point of exhaustion.

Post Covid recovery, weakness is not uncommon High protein diet with nutritional supplement is advisable

Do yoga and meditation, eat healthy diet, keep taking multivitamins