What Causes Prolonged Periods With History Of Having Cysts And Gallstones?

Good Evening,I'm here to see if someone would assist why my menstrual lasted for a month.I've had many heavy bleeding with blood clots. And it seems that it's a never ending menstrual cycle. How can I determine why my menstrual is lasting for this long period. I'm 35 years old, I have no allergies to anything, I'm active, but not as active as I should be. I'm 5'9" and 170#. I do get bloated. I've had previous surgeries such as cyst in my ovaries, which was removed during my 2nd trimester of my pregnancy with my 2nd child. I did have gallstones in which was also removed. And nothing more. Thank you for your time to see what may be causing my menstrual cycle to last this long of a period.Heather Martinez