After sickness, it takes time to get back to daily routine. And it is hard. You are tired, everything hurts, you cough, out of breath.
But the longer you postpone moving, exercising, working, the longer the recovery will take. As soon as possible, you need to start moving, working, at least a bit, and more the day after. Increase your load every day and soon you are back.
If you wait until you are 100 percent again, you will be delayed by weeks.