Recently I have recovered from cold and flu and It's been three days I am Not consuming any medication anymore. But still there is constant feeling of dizziness or light - headness whenever I go out and if I am at home I want to sleep, then only I feel good. As soon as I come home I get the urge to sleep. My sleeping hours have increased and my appetite has been reduced. I even sometimes feel too weak to do any activities. What do I do.