Suggest Remedy For Irregular Periods

hi i am lachu i am 25 years old female.i am living in australia. i have menstrual problems that mean period not come in regular date.once start the bleeding its continue 10 days.i went to doctor he gave the iron tablet your iron leave is low so you have that problem.last 5 mounth continue the problem not cure.my weight is increased.i expect pregnant pls give me a solution