I'm 37 years old and I've had the Mirena for 2 years now. Within the last 6-8 months I have been experiencing the same thing. I feel like I have to pee all the time. When the feeling comes on it is an EMERGENCY! I have had minor accidents. I havent had children either. I've never had this problem before and I limit my caffeine already so that is likely not the issue for me. I'm waiting until the first of the year and telling my Dr to take it out and do ablation. The more I think about this thing inside me all the time, expressing the same amount of medication for me as it does for you and every other DIFFERENT woman.... it doesn't seem right. Good Luck to you!