My boyfriend and I had sex for the first time on friday 10th and it was unprotected. He didn't not come inside me, he pulled out 45 secs before. I do have a period tracker which is normally accurate, it said my ovulation day was Tuesday 14th. I took the plan b pill on Sunday 12th. What are the chances of me becoming pregnant? If I use protection, is it still a bad idea to have sex around my ovulation day?