Iud/mirena

Colby
I have the iud I got it 6 weeks after my daughter was born in May of 2013 and I haven't had a period since about January of this year. And when I do "bleed" it's like a brown creamy stuff and not a whole lot. And I'm having bad ovarian pains due to a cyst. What should I do. My doctor says it's not because of my iud and they put me on medicine but it didn't help...