How high is the fever? If it’s not more than 100.4F then it’s fine, but if it’s crossing that go for typhoid, malaria, dengue, and urine infection check and also a chest X-ray. Speak to your doctor again. Fever of I know origin should not be undiagnosed for 10 days. Treatment as per diagnosis. Alternatively have high protein in your diet like eggs and chicken for a few days, vitamin c1000mg a day. Lots of water.