I had my Mirena put in when my daughter was 7 months old (August 08), I stopped breast feeding that day. Last week when I went to have it taken out in order to get pregnant, found it had perforated. i am having surgery (breathing tube and all) on Monday. I have also had acne, which I haven't had before, and headaches for about 2 months, guess Ill find out if it is related. i guess if you have the mirena put in while lactating it is more likely to perforate. I had small shooting pains for 3 days after it was put in, then they disappeared.