Coloured discharge after antibiotics for BV

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I went to my doctors after a few weeks of white creamy discharge, they tested me for everything and it came back with a minor infection for BV. I had a 7 day course of antibiotics to help get rid of the infection which finished 2 days ago. My period ended 3 days ago and ever since I have experienced brown or different coloured discharge. Does anyone have any ideas what would be causing this?

I have this too constantly with BV. I would imagine you bleed from time to time and get pink discharge as well?