First, I guess you're a medical student since you don't know the DDx of a common complaint in Ob/Gyn that can signal the need of urgent intervention. Getting more detailed history can be beneficial to narrowing any DDx you could find. Onset, Duration, Amount, Timing, Smell, LMP, Associated sxs (pain, fever).
I can understand not knowing something, but what I can't understand is spending time to ask an anonymous question on a forum instead of going to a reputable website, resident, or even nurse to find information on the DDx.
Medicine is a vast field and no one knows everything. What you will be persecuted for is your inability to take responsibility for your own education.
I did a simple google search and found a few (14) causes.
Not a lecture; just saying that a little effort goes a long way in OB/Gyn. You won't be left out there to kill a patient, but you would learn more if you read up on the most common topics and asked residents to fill in the gaps.
Be a more enthusiastic learner in whaterver specialty you choose, f
or your patients sake