1 month long period...?

ive had my period for about a month now.. and its been pretty steadily heavy.. im 14 years old and i got my period 1 1/2 years ago... usually i would think this was just irregular cuz im starting out, but i have been EXTREEMLY tired.. like.. physically.. when i run like 30 ft i start to like.. pant.. and my pulse goes up to 120 i play soccer so im pretty fit.. and this is not normal.... yah...