If you feel like you have a bit of energy, why not take a walk around the neighborhood. The fresh air might do you some good. However, if you're sniffling, sneezing, feel fatigue as well as aches/pains, it's best to lay off any exercise until you start feeling better. There is no point trying to exercise if you can't breathe properly.
Take a couple of days off to rest. You will not derail any of your efforts at good health or weight loss if you take a few days off to recover. Good health isn't just about getting exercise, it's about taking care of our bodies.