Final answer:
The most likely diagnosis for the woman's symptoms is adenomyosis, a condition in which the endometrial tissue grows into the muscular wall of the uterus. Treatment options may include pain medication, hormonal therapy, or surgery.
Step-by-step explanation:
The most likely diagnosis for the 42-year-old woman with progressively worsening severe menstrual pain, heavy flow, and an enlarged, soft, boggy uterus is adenomyosis. Adenomyosis is a condition in which the endometrial tissue grows into the muscular wall of the uterus, causing pain and heavy bleeding. Other symptoms of adenomyosis may include blood clots during periods and prolonged periods.
Treatment options for adenomyosis may include pain medication, hormonal therapy, or surgery to remove or shrink the abnormal tissue.