I am seriously considering getting an IUD next week. I currently use NuvaRing, but I like the idea of not having to think about BC for 5 years. Plus, I get really bad endometriosis pain fairly often and Mirena is supposed to be the best for that.

Every site I've read talks about how painful the insertion is. I'm not worried about v* from pain, but I am nervous that I won't be able to relax enough to have the procedure. Plus, I haven't really had any serious side effects on NuvaRing (no weight gain, mood swings, etc) and I'm nervous that I won't adjust to a new kind of hormone as easily.

Does anyone have any experience with this type of BC?