I began suffering with tailbone pain without injury approximately 5 months ago, could it be my mirena?

I am 27 years old, white and female. I am 5’9 and 215lbs. No prior history of surger. History of 2 vaginal births with epidural both times. Family History of Lung cancer, skin cancer, breast cancer, CHF, diabetes, heart attack, COPD, degenerative back disease, and color cancer. I began suffering with tailbone pain without injury approximately 5 months ago. I cannot sit for long periods of time. I have no pain when standing, walking or while lying down. I do have the mirena and it was placed approximately 2 1/2 years ago. I have also experienced fatigue, increased appetite, and memory fog since having the mirena placed. Could my mirena be causing my back pain?