Hello, I had my Mirena IUD removed on December 2nd and I got my period on December 4th. My period ended yesterday, December 8th and I had unprotected intercourse with my boyfriend. I felt very nauseous and I had some menstrual-like cramping when I woke up this morning. So my question is: Is it possible that I could be pregnant? Is this my fertile window? Thank you all so much.