What Causes Brown Vaginal Discharge Whole Suffering From Irregular Periods?

I have recent history of PE (multiple, bilateral with infarction) in July 2017 and again in Nov 2017 after given the okay to stop anticoagulant treatment. Ive had irregular periods since July 2015 (Mirena inserted Jan. 2015). I got an ultrasound in Nov of my ovaries and uterus that showed my Mirena was extremely low tilted to the right and embedded into my uterine wall. Two days later I got it removed (took a few good pulls and tugs) and immediately got another inserted. I had minimal bleeding for just a day or two. Then about a week later i got a semi heavy flow (on anticoagulant again) period that lasted 5 days. Two days after period ended i got a gush of blood that only lasted a couple of hours then immediately after, I had brown discharge every time i wiped. My urine is light in color so i have eliminated dark pee as the cause. Today marks 8 days after last day of period and i am still having this discharge. It does not smell and it doesnt get darker in color. It is there every time i wipe but does not leak onto underwear. What could be causing this? I know i am not pregnant and i just dont know what to do or what it could be.