What Causes Spotting To Heavy Bleeding Having Adenomyoma And Adenomyosis?

Good day. I am 51 years old, female. My meanstruation became irregular 2 years ago. Last year, I think I only had one or twice, and it was heavy. There were months I had spotting. But This Feb, My period began on the 14th, which was light for the first three days, but became heavy for the next 5 days. Then it got lightter the ff. 4 days. And again, a heavy day, and lighter again. Until now I have spotting. I had ultrasound done last week, it says, i had adenomyoma and adenomyosis, endo is normal. pap smear is normal. I took Hemostan last week for 5 days, 1 mg 3x a day. It got lighter but spotting continues. Now My OB gy gave me primolut. i am on the 5th day, but still having spotting. please enlighten me. Thank you.