Hello,
Brown discharge can be due to ovarian problems, hormonal imbalance, stress, anxiety, crashed dieting, use of birth control pills, change in environment, excessive exercise etc. Heavy bleeding can be due to can be due to hormonal imbalance, fibroids and polyps (non cancerous growth) in the uterus, endometriosis (deposits of the inner lining of the uterus in the pelvic cavity) etc. You might have to go for a complete hormone profile and ultrasonography to know the cause of this .Get in touch with an Obstetrician and Gynecologist for further assistance.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
it is just a weird period quirk like that. there is nothing wrong with you. your period is just drawn out for whatever reason. The brownish discharge is just older blood from tissues that were already broken down and just waiting to come out of the body. The most common reason is starting/changing birthcontrol. If you miss doses it can draw it out too. It throws the chemicals that regular the menstration out of whack. Stress can cause it too. There are some herbal things that can throw it out of whack too.