I Have Been Taking YAZ For Over A Year Now.

I have been taking YAZ for over a year now. While on a holiday, I went to visit a doctor in regards to tonsilitis and she prescribed me penicillin but didn't say anything about it interfering with my yaz. When I returned from my holiday and met with my normal gp she said penicillin stops my YAZ from working . I was only exposed to precum during this time but I'm still scared as I know this poses the threat of pregnancy, I'm currently on the third inactive pill on my YAZ and have no signs of getting my period . Instead I have discharge similar to mucous like clumps... Please help!!