all I have to say is Mirena is GREAT!!! I used it between my first and second children and it was a lifesaver. In fact, after I deliver this third child, I may use it again, rather than having my tubes tied. That way, if for some odd reason-heaven forbid-I want to get pregnant again, I can.
Mirena is so small, you don't feel anything-the insertion can be a little uncomfortable, but some otc pain reliver should take care of that. I will warn you though, you will have about 1-2 months of spotting continuously (no more than a mini pad will be needed). But after that your periods will lessen or disappear completely-like mine did. And also to let you know, I am extremely pro-life and didn't want anything that may even harm a fertilized egg, but the mirena doesn't do that. This is what I think is going on (but check with your ob to be sure): it makes your body think it's pregnant...therefore your periods lessen or stop, and it stops conception.
I went with the Mirena b/c I have scary reactions to the hormones in birth control pills. I need something that is localized, not something that travels through my whole body to work. I tried the Nuvaring, which was ok, but a pain to replace monthly.
Everything else, just didn't work for me.
I would seriously think about trying Mirena. I've even heard it works better than having your tubes tied. The percentage of births happening is lower.
Hope that helps! -A.