 [ Symptoms ] if we cont to have sex with a used condom for a few strokes and some cum leaked out the bottom on my hip is she pregnant the condom did not break i made sure by doing the water test and she has been on birth control but has been on antibiotics for a week then stopped taking the antibiotics 2 3 days before our sex should i get plan b [ Disease ] hi so do we take it she was on top if so then i do not think you have a problem but some high strength antibiotics do reduce the effectiveness of bc pills but please to stop your worries do use plan b if this was within the last 72 hours its called piece of mind do hope this helps you good luck