I got my first period at the age of 12. It's always been irregular. Irregular means 2-3-4 months. Still I didn't have my exact period date. I got last period in April. And now it's been 2 months. I also had ultrasound of my uterus and doctor said shape n size of the uterus is normal. Other things are also normal. So What is the reason for that? Kindly prescribe me some medicine for getting regular period?