Which of these statements made by a​ 2-year-old female patient would make the EMT highly suspicious of​ mittelschmerz?
a) ​"I had some sharp belly​ pain, but it seems to be going away​ now."
b) ​"My menstrual flow seems heavier than​ normal."
c) ​"It seems that I have had a yellow vaginal discharge for two​ days."
d) ​"I finished my period yesterday and now I am​ nauseated."