constant brown discharge

for around 3 months now i have had brown discharge. usually it is just light brown, like you can still see white discharge in it. but when i get fingered, i check my underwear and the discharge is very brown pigmented, like all brown, zero white or clear discharge. i do get my period on a regular basis by the way. but never do i have pure white or clear discharge there is always brown in it. it is constant and consistent i cant remember when i have last had pure white or clear disharge. 💀 i am 14 by the way. why could this be?😩