I am on birth control and have been for a few years. I had unprotected sex on Tuesday I believe around 8:00 pm and my boyfriend came inside me... I am scared my birth control isn't enough because I had been taking Ciprofloxacin for a bladder infection about two weeks before the unprotected sex so I was afraid it effected my birth control? So the next day at 5:00 pm I took the Plan B pill. My period is suppose to come in the next 4 days. What are the chances of me being pregnant? The sex was 5 days ago and I start my period in about 4 days so I don't believe I was ovulating? Help me I'm so worried!

Ps: I haven't taken my because pills any days late only hours in the day late...

Sorry a lot of into I'm freaking out! Help