About 3 nights ago, I had unprotected sex with my bf. He didn’t finish inside me, he didn’t even finish at all because we started getting hot and stopped. I’ve been on the Paragard IUD for about 5 months now but I believed it had dislodged. I was seen by a doctor, she told me everything was fine, it still looked intact, but I overthink things and started doubting her. Should I take a plan b?