I started birth control in August 2014, and I've been having unusual periods. The past two periods I've had have lasted two weeks & bleeding heavily. Now, a week after having a two week period, I've started yet again and this time it's worse. Help?

You may be suffering from a side effect of the birth control medication.  All medication has benefits and risks.  Birth control is very safe, but sometimes someone will have a problem with one of them.

I would contact the healthcare provider that prescribed the medication.  They will probably switch you to a new one that you won't have problems with.