birth control
"I'm 21 and I have had Mrena for about 7 months now.  Unfortunately I haven't had good results. I now have my period 2 times a month, and if I'm not on my period, I have a yeast infection. My doctor did cultures and test and couldn't figure out why the infections were coming. My guess is the Mirena because that's when it started. I'm scheduled to get it taken out."