Mirena fan here too, 6 months or so away from
getting my third. A few weeks of spotting followed by years of no periods, bliss!
Definitely agree with getting an experienced fitter if you can, I had a horrendous experience with my
local family planning clinic, a slightly better one with a hospital gynae and a totally painless fitting with a gynaecologist who specialised in colposcopy investigations so was well versed in such things. I'll definitely be returning to him when it's time for my next one!