I Visited My Doctor For My Annual Pap Smear. When

i visited my doctor for my annual pap smear. when he did my pelvic exam he told me i had an enlarged uterus. He ordered an ultrasound. The ultrasound showed no fibroids and only one very small cyst. He told me my uterus was that of 12 weeks gestation, but am not pregnant. My pain circles my whole abdomen front to back and lower back. I have a D&C scheduled for 2/17/16. 5 weeks from now. He told me I had to have the D&C before he could get a hysterectomy authorized by my insurance. He really didn't tell me what my problem could be except for uterine malignancy. any advice or thoughts???