A woman has been hospitalized into a gynecological inpatient department with complaints of pain in her lower abdomen and dizziness. Her last menstruation was 6 weeks ago. Objectively, her skin is pale, blood pressure 80/60 mm Hg, pulse - 94/min. The sign of peritoneal irritation in the lower segments is positive. Bimanual examination shows that the uterus is slightly enlarged, the appendages are enlarged on the right and painful. Promtov's sign is positive. What is the most likely diagnosis in this case?