MY IUD CAME OUT

yup this is the Horror story I'm sure you've all been worried about. I got the mirena inserted 10-11-17, and today I had the 4-week check up and she told my that it had pushed out of my uterus into my cervix. I've been having unprotected sex, and my partner has finished inside me about 4 times over the weekend and I bled a little after intercourse so I assumed an early period, so hearing this news today was fabulous. After she pulled it out I've been bleeding so heavily and she put me on the pill so I took the first pill today. Is there a possibility I could get pregnant??