I am on my second Mirena. The first one was in for the full 5 years and I am on my 3rd year of my second one. My partner also has had a vasectomy, which was completed approximately 7 years ago. I ve been feeling nauseated on and off, extremely tired, headaches, breast tenderness, and really crampy for the past 2-3 weeks. Is it possible that I could be pregnant?