I started my birth control this past Monday which means I've only been on birth control for about 5 days and last night on the 24th I had unprotected sex and we weren't sure if he ejaculated inside of me. I took a plan B pill within an 1 hours after the unprotected sex. Although I've started birth control since it doesn't work the first month was it a good idea to take the Plan B pill? Could the plan B not work because of me taking Birth control? Should I continue to take my birth control? Could I still get pregnant? Is it possible I won't have a period this coming month?