Recurring BV - Clindamycin Antibiotics

I was given Flagystatin pessary when my gynae first detected Gardnerella and yeast infection in me about 4 weeks ago. Went through 10 days of antibiotics and BV still came back once I stopped medication. He’s now prescribed me with a new course of antibiotics - Clindamycin, for 7 days. I’m honestly not keen to go through another round of antibiotics as I’m worried about the long-term effects it’ll have on the baby. Just wondering if any mummies out there went through something similar and whether the antibiotics helped stop their BV?