Hi, Menstruation is a natural process in which the uterus prepares its wall for implantation, in order to receive the baby every month. When there is no implantation, the wall sheds and gets back to normal level. This shedding of the wall of uterus (inner lining) is seen as menstruation. It is regulated primarily by 2 hormones, levels of which keep varying all through out this process. Irregular menses are quite common and happen due to the hormone imbalances. This condition can be managed by taking hormone pills as per the advice of a gynecologist. Dizzy spells may be related to your hemoglobin levels. I would advise you to get it checked at the earliest. Its not an expensive investigation. It also could be normal to have it as seen in a condition called postural hypotension. Slurring of voice would need a thorough clinical examination and a series of investigations. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Anoop Kumar, General & Family Physician