Given your description of irregular menstrual cycles, lack of periods for 4 months, negative pregnancy tests, and overweightedness, it seems that you might be experiencing amenorrhea.
Amenorrhea might only be a sign of an underlying condition. There are two types of amenorrhea: primary (if there were no menstruations at all by the age of 16) and secondary (if a woman menstruated before, but has been missing periods for 3-6 months or longer).
Secondary amenorrhea is a more common type and might occur due to a number of various reasons: pregnancy (most likely with women in their reproductive years), breast-feeding, contraceptives, stress, hormonal imbalances (polycystic ovarian syndrome or other), certain medications, low body weight or great variations in body weight, excessive exercise, thyroid or pituitary malfunctioning, etc, all conditions that need to be excluded or confirmed through various tests by a specialist doctor.
Because of the complexity of the possible underlying condition, you might want to check with your gynecologist for further advice.
DISCLAIMER:
"Ask a Doctor" questions are answered by certified physicians and other medical professionals who volunteer
their time on eHealth Forum.
For more information about experts participating in the "Ask a Doctor" Network, please visit our
medical experts page.
You may also visit our Menstruation , for moderated patient to patient support and information.
The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician.
Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.
