Should I consider birth control?

I am 14 and have had my period for a little over year. I know its normal to be irregular but mine gets so bad that I sometimes have my period twice in one month. When I get a second period in one month it is usually toward the end of the month. My period has only been consistent for two months at the most. At first it was pretty easy to figure out when I was going to get it because it would fall towards the end of the month, then right when I started to figure that out it went crazy and never fell in any way that I could even begin to try and track it. I am always worried that I am going to start it in the middle of school or whatever. I always carry pads around but when it starts there is usually no sign like cramps or headache. I just notice the blood in my underwear =.= I don't think my mom would have a problem with me being on birth control for my period because she uses it to regulate hers. Do you think I should use birth control to help regulate it? And do I need to go to a gynecologist to get the pills or can I go to my regular doctor?