A 28 yo woman with a PMHx of chlamydia presents with LLQ abdominal pain for the past 8 hrs

A 28 yo woman with a PMHx of chlamydia presents with LLQ abdominal pain for the past 8 hrs. She also states that she has some abnormal vaginal bleeding. Her LMP was 6 weeks ago. Temp 37.2oC, HR 100 bpm, BP 130/80 mm Hg, & RR 13 per minute.

Which of the following is the most likely diagnosis?

A. Diverticulitis
B. Ectopic pregnancy
C. Ovarian torsion
D. Ovarian cyst