I am 53 year old woman, for last 2 months

Patient: I am 53 year old woman, for last 2 months I have been experiencing reoccurring on set of fever every 5-6 days, I take physician’s recommend medicine and I am ok after that.However, for last 10 days I have got severe body ache and fever of 99-100°fThe fever only goes away if I take medicine, have done complete course of antibiotics but improvement in condition. Have also undergone the normal blood work along with specific tests for malaria and typhiod.The physician is now advising me to go for a ultrasound of stomach.Can you please help in diagnosing my health issue.Thanks

Doctor: