Birth control problems?

Elizabeth
Hello! I've just started the pill about two weeks ago on the first day of my period. My period usually lasts about 6 days, is extremely regular, and I don't bleed much. I'm also anemic, and take supplements for it. Since starting the pill, I overflow a super plus tampon mad maxi pad every 40 minutes, huge clots, and I've had my period for two weeks now and it gives no sign of stopping. The doctor said irregular bleeding is normal, but my mom is worried because of the blood loss and I'm becoming pretty weakened from how much my iron is being affected. 
Also, I feel like I should add that I'm a 100 lb, 5'3" 16 year old girl and have never had heavy periods in the past four years. 
Planning on calling Doctor tomorrow. Is my mom just being paranoid or should I be concerned?