hello and thank you for asking HCM,
I understand your concern since this problem is affecting your daily life and you have to wear liners for a longer period.
Brown discharge after period is not uncommon ant in most cases there is nothing to worry about. If you have spotting a couple of days after your period was supposed to end, it might just be leftover blood and your uterus
is simply expelling old blood.
If the brown spotting
and discharge turns a bright red or lasts more than three or four days, you should visit your gynecologist to find the exact reason. It could be anything from ovarian cysts to polycystic ovary syndrome
I hope this answer was helpful to you.