That's definitely not normal and you could be losing a lot of blood. Go to your doctor as soon as possible.
As a side note, I had a friend who was having trouble getting pregnant due to irregular periods. She started taking birth control to regulate her cycle. With the pill, you have 3 weeks of birth control and 1 week of "placebo" pills. During that week, you can get pregnant. Talk to your doctor. It might be worth a shot.
The best thing you can do is talk to your physician and ask many questions. Know what your chances are. Having a period for a month does not sound normal and its something that you should definitely have checked out
Hope this helped & good luck!!