Does Flucloxaillin Affect The Effectiveness Of Birth Control Pills?

I've taken two flucloxaillin tablets and im currently on the yasminelle tablets too , have been for nearly a year now , I have stopped taking the antibiotics because they realised that it would clash with my pill , tehy said it would take a month for the pill to become effective again , But i asked another a pharamasist and they said I should be fine , Would really like a proper answer , anyone know when it will be effective again ?