Aiyoh, keputihan yang berair macam tu memang common especially if you're pregnant or have GBS, a few of my mum friends went through the same thing and their doctors said it's normal lah, body just producing more discharge during pregnancy. Since you've already insert ubat from doctor but it came back after a week, better check back with your gynae to confirm if it's still the GBS or something else, sebab sometimes kena apply longer or need different treatment, especially if pregnant!