Welcome to healthcare magic.
After analyzing your symptoms it appears as though you have a hormonal
problem while it may be thyroid related i am more inclined to believe it is PCOS (Polycystic ovarian syndrome
). It is a widely prevalent condition and is treatable.
The condition usually presents with a variety of symptoms that are a manifestation of a curious interplay between the levels of two different but interrelated hormones-Estrogen
This can be diagnosed through an ultrasound
but at times it is missed especially if the cycts are too small.
The D & C has both diagnostic and therapeutic advantage because it will cause the bleeding to stop immediately, so that is a good thing to do.