I am 19 years old and i have really irregular periods. I have my periods at most 3 times a year. I`ve always had really irregular periods but now it seems I don`t even get them anymore. I have complained to doctors many times and they`ve just told me that it`s because I`m not yet 20 and it will become regular around then; however, I am really worried because all my friends have it regularly and I don`t. Additionally, my lower abdomen hurts often and I have to pee a lot