T.H.
Well I'm on my second mirena and I like it. With my first I had irregular bleeding for 3 months and then it stopped. Then I got a period every month and then those stopped too. This time around it probably took about 3-4 months to stop the weird bleeding, but then it did. I've had it in for 2 years and I haven't had a period in at least a year or more. It works great for us! I do think you should probably give it another few months, but if you're miserable then maybe it's not worth it.