Hello, I have been taking my pill packets back to back so haven't had a period for a while. I was on strong antibiotcs for a week, I finished the antibiotcs and then had unprotected sex 4 days later. I thought that was fine until I read on a forum your meant to use protection whilst your on them and for a week later, is this true?

For many antibiotics it is indeed true.

I was OK metronidazole, is the rish high?