Hello there, I am dr.milan an infectious disease specialist answering your question. I think you should ask your doctor what type of bug is there, bacterial or parasitic? I feel that you have parasitic infection, and also your doctor is thinking the same. But you you should investigate and diagnose which parasitic infection is there. You Need to go for stool microscopic examination for three days consecutive if once sample is found negative. According to that treatment duration is planned. Antihelminthic drug is to given if this will diagnose as parasitic infection. Along with that you do your blood differential count. So it reveal that do you need for any supplemental vitamins or minerals or iron because parasites deprive us from absorption of this content. So go for investigation and follow the advise of your physician for treatment. Hope i have given appropriate guidance to you. if you have any query you can consult me anytime. Give me star rating, helpful vote & thank you according to your satisfaction level. Thanking you.