Nak, this sounds concerning, please see your doctor or go to the clinic soon para ma-check kung okay lang si baby, especially habang on antibiotics pa.
Fever na bumabalik-balik while on antibiotics needs medical attention talaga, hindi lang teething yan. A few of us moms have been through this, and the doctors always want to monitor it closely. Don't worry ha, pero kailangan niyang ma-examine ng doctor para sure na okay ang medication at walang ibang nangyayari. Sending strength sa inyo!