Out of whack

Erica
I was a week late for my periods then I started it and had it for almost 6 weeks two weeks after it ended  it started again and now I'm on day 8 on the second period I went to the doctors and said this can be normal. For me I can predict the day I will start and end I will end and never have been later before. Has anyone had this or know if it's normal or what's going on!?!