Hello der really sorry to hear your problem,,,,,,,dear in my openion acoory to what you say you have heay cycle ,,,bulky
uterus and you have spotting after cycle tooo,,,,,this seems to be
fibroid uterus to me,,,,,i think get a 3d scan of lower abdomen,,,,dear nothing to worry so ,,,,,thisvcondotion is controlable with medicines and if god forbid medicine dont work then go for surgery f you have completed your family,,,,two types of surgery their myomectomy removal of just fibroid or total hystero,salphingo,opherectomy,,,,,,,choice will be yours ,,,,,,,,,,,,take care stay blessed