Welcome to HCM,
You are having gestational diabetes
and bacterial vaginosis
,as diabetics are more prone to infection please take care of your blood sugar levels.
If a culture is done and sesitivity test shows effectiveness of Macrobid
it can be used in pregnancy
and risk and potential benefit needs to be considered.
Your terating doctor is best person to know what is best for you.
There are many antibiotics which are safe and some are absolutely containdicated.
You should follow advise of your doctor and take care of personal hygine also.
This drug should be avoided at the full term but during 30 wk may be used with consultation of your treating Gynecologist.