I have a low grade fever but no other symptoms? How long should I wait at home?

How much? Need to know how much fever, and how do you feel. Do you have any risk factors for other illnesses? Fever, in and by itself, is not particularly disturbing and will probably go away spontaneously in time, but if it is still going on in a week, you have other symptoms, your appetite is waning, you are having night sweats, then it might be appropriate to get looked at. Keep in touch. Get better.