Hello
Bacterial vaginosis, trichomoniasis,yeast infections(fungal) are common vaginal infections.The symptoms you are describing are suggestive of any of these vaginal infection.
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Check this link
http://hcd2.bupa.co.uk/fact_sheets/html/vaginal_infections.html
Your gynaecologist has given Metrogyl antibiotic in a broad sense to cover various infectious organism causing bacterial Vaginosis and Trichomoniasis.
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