Hi, I had unprotected sex last Feb.3, (i believe that was my ovulation and i m fertile) after 6 hours I took 4 pills of nordette 21(pfizer) and then after 10 hrs I felt nausea and I vomitted, but I still continue to drink 4pills at exactly 12hours after the first dose, but roughly after 4 hrs I vomitted again. I went to see a doctor On feb.5 and prescribed an antibiotic called cefuroxime axetil. I am worried that this drug may lessen the pill s effectivity. Would nordette still work though I took the antibiotic? Or even though I vomitted, does it not affect the pill s effectivity? What are the chances of getting pregnant? Is there other way to prevent it since i m still within the 120 hours timeframe of taking nordette as ecp? (By the way, i m regular and my next period should be around 18-20th) Hope you can help. I ll greatly appreciate it.