Hi there...it may occur in women who have anemia i.e low haemoglobin levels,diabetes or thyroid problems. It is also common in women with high levels of a protein called prolactin in their blood...it can be the side effects of certain drugs like oral contraceptives,antipsychotics,antiepileptics...it may be due to poly cystic ovarian disease as well... So I would suggest you to consult nearest gynecologists for detailed clinical examination and evaluation they will do the needful

It's not normal to have irregular periods  ( early or late), missing periods, spotting between periods, prolonged heavy flow, pains and cramps during cycle, PMS and mood changes before periods, PCOS, Fibroid, Endometriosis,  fertility issues, tiredness, hair fall,  sleep disturbances, weight issues etc. If it is happening to you,  it's a sign of underlying  hormone  imbalance  which needs further evaluation with blood investigations , scan etc.Good news is that all your problems  can be totally  reversed , not by masking the symptoms  with pills but by addressing  the underlying  cause of the problem and healing it from the ROOT cause which is not in your pelvis BTW. Hope it helps.....