Enlarged uterus! Very concerned about results

I have a history of menorraghia to as far back as I can remember. I am 46 & usually have my period every 23 days. Usually lasts for 2 heavy days & 5 days light spotting. I had an ablation done in 08 that was good for a year but then it went right back to my heavy periods. My uterus has also always been retroverted.

I just got back from my OB/GYN who tried to do an endometrial biopsy but said he "couldn't get in and now wants to schedule a D&C at Hospital. I am very concerned about a recent ultrasound report that reads as follows:

Findings(Transabdonimal) This study has a prior study for comparison dated 12/7/09. At that time, the endomentrium measured 7 mm. There is a small posterior leiomyoma that measured 1.2 cm. Currently, the uterus in in a normal anteverted anteflexed,orientation, but has enlarged since the prior study, currently measuring 13.9. x 7.8 x 5.6 cm compared to a prior measurement of 8.8x 6.9x5.9 cm. The endometrium measures 12 mm, which is mildly thickened and is considerably thicker than the previous measurement of 7 mm. The right ovary is normal measuring 2.1 x 2.2.x1.9 cm There is a cyst in the left adnexa measuring 1.7 x 1.2x1.3 cm. There is no free fluid within the cul-de-sac.

Conclusion: The uterus has gotten considerably larger than on the prior study and the endometrium is thicker than on the prior study, currently measuring 12 mm.