Mama, please follow your OB's advice, kung siya ang nag-prescribe, she knows your full situation and lab results, kaya trust her on the dosage and schedule na sinabi niya!
Just make sure you take it exactly as instructed (the 2x a day), complete the full course even if you feel better, at i-monitor mo kung may unusual reactions. A few of us moms learned the hard way na important talaga to follow through completely with antibiotics, stops the infection from coming back. Kung may concerns or side effects during, message your OB agad, okay? You're doing great by getting it checked early!