Hi and thanks for the query, Its very imprtant that the cause of the fever be identified and eealth with properly. High fevers are especially dangerous for pregnancies for they could lead to miscarriages. Bed rest and compliance to treatment are very important in this case. The drugs will certainly have no side effects on the bay if prescribed in appropriate doses and taken as recommended. A strict follow up by your obstetrician is a requirement in this case. Immediate reporting of any unusual phenomena to your physician is a key aspect in the patient s care. An obstetric ultrasound might be needed at some point in the porcess if actually deemed necessary. I suggest you stay clam for now and compliant to to your medication. thanks and hope this helps, Luchuo, MD.