I have been on Microgestin Fe 1/20 for 5 months and never missed a day nor was late taking them. My doctor recently switched me to a stronger dosage of the same pill, so Microgestin Fe 1.5/30. I started this new birth control Saturday of last week. It is Saturday today, and my boyfriend and I had unprotected sex. (My boyfriend and I ensured that we are both STD free and we are each other's only sexual partner). My question is, in starting a stronger dosage, do I need to have waited a month before having sex??? Or am i protected since I have had the other one working perfectly for 5 months? Should I worry about pregnancy/take plan B or am I protected??? Any input helps. Thank you for your time and answers!!