I have used Lugol's in a tampon, together with magnesium chloride and some citric acid to manage ph (should be slightly acidic, ph between 4 and 4.5). Make a solution of the three in water. Insert your tampon. Use a syringe (without needle!) to get the solution into the tampon.
I couldn't tell whether this helped anything or not, because, well, one can't look into the uterus. But it did stop intermittant bleeding.