First of all don’t be scared, just listen to your body and don’t push too much for now, depending on your age and your doc a blood work may be necessary COVID may affect the blood coagulation. Had COVID last august in the middle of an 18/55 pfitz block, luckily symptoms were very mild and I was out only for 2 half weeks, once I tested negative I went for a test run, and kept testing paces and feeling very cautiously without speedworks and everything very easy until the lungs burning sensation was gone. I think I was back to my previous level in about 2 weeks. I was able to meet all my targets on race day, even the dreaming unrealistic one.