You are probably coming down with something. Stay away from everyone. Use your own utensils and bathing towels, wash cloths. There is a period of time when you are contagious, so contact your doctor about your symtoms.
The best way to tell if you have a contagious virus or sickness is to visit a doctor and be diagnosed. Once you are diagnosed, a doctor can tell you if you are contagious and how long you will be.