can someone pls respond idk if i should be concerned

i already posted twice in the pill talk but no one is giving answers. i’m spotting over a week after my “period” has ended. the first week after it ended there was nothing but now everyday i am spotting and it’s getting heavier and heavier. i have not missed any pills and i’ve been on the same bc for a very long time. the first day it was light red now it’s dark and brown, today there was even a clot. i have no clue what’s going on this is not something that normally happens. i have made no lifestyle changes other than entering a small calorie deficit and starting a probiotic which should not be interfering with my bc.