Did you have a hysteroscopy when the polyps were removed?
Do you take any medications?
Are you having pain now? Thank you.
A hysteroscopy is not a hysterectomy. It is rather the use of a scope to look inside the uterus, and polyps can be removed using the hysteroscope.
The bleeding is not usual, but may not be anything to worry about. I can answer better once I know whether you had a hysteroscopy.
As long as you had a hysteroscopy, I don't think that the bleeding is anything to worry about. The Merina tends to prevent bleeding, but having some bleeding with the Mirena in place can occur. Cancer has been ruled out.
I'd be more concerned about the lower abdominal pain. It seems to be related to the bleeding, but the Merina shouldn't be causing pain, plus you are highly unlikely to be having pain from something like an ovarian cyst, which is common in younger women.
Perhaps the pain is related to your intestines, bladder, or something else. But it's not normal. If it continues, I would suggest seeing your doctor to figure it out. An ultrasound may help to know what is going on in your lower abdomen. And further questions and history can help to know whether it might be bowel or bladder related.
If the pain should disappear, I wouldn't be worried about the bleeding. I think that will take care of itself. Best wishes.