Pain.

Okay so lately my period has been getting worse and worse every month. It used to just be mild cramps, breast tenderness, a little back pain and a head ache. But now its to the point where it feels like I'm being ripped open and I throw up nearly every time, and Get extremely light headed which normally leads to fainting and black spots in my vision. I've taken muscle relaxers, ibuprofen, midol, etc. Nothing seems to help the pain or anything else. Because I'm underage my mom won't put me on birth control because she's afraid of long term effects and doesn't want to take me to the doctor yet. I need help, I cannot take this. Does anyone have any idea what could be going on and how to help?