Hello
You are having irregular period ,
amenorrhea ( no bleeding ) age 23 years .
Your nurse practitioner diagnose it as pcos ( poly cystic ovarian syndrome).
Actually she advised you medicine for pcos and the medicine (
metformin perhaps ) for diabetes and pcos are same , so need not to concern.
Since you are in dilemma , so get in another
ultrasound from another center .
Also get in blood examination for FSH/LH (ratio) , estrogen , androgen levels .
Actually irregular menstrual cycles , amenorrhea ,
dysfunctional uterine bleeding are the common symptoms in pcos cases .
Since she also diagnosed as thinning of uterus wall so consultation with a gynecologist is important .
Acne ,
hirsutism , obesity are the other symptoms for pcos cases.
So in my opinion don't desperate , rather consult a gynecologist and get his opinion .