Hi Lily101
I have not had children and would support what Jaynej has said - it was v. painful to get it past the cervix and remained so for me, tried twice, 10 years apart, and decided to have it removed within a week both times as my body was just not having it. If you decide to go for it then you may need to hang on to the nurses hand during the procedure and then I had to rest as I got the most awful cramps - I came home at 10am and had a double whisky straight from the bottle! I would have it done at a clinic as has been suggested by someone who does it every day. I had it done by my GP who got it in no problem, but I think having someone with the expertise who does it everyday would be sensible.
However I think I just had a bad time and suspect I am in the minority. For those ladies who it suits and I have friends who swear by it, then it is a super solution, and some friends even went back to work immediately after, so no worse than a dentist visit. Happy to answer any questions. There was a thread about this some time ago so perhaps search Mirena and you might find out a bit more.
I think I saw from your previous post that you are on Femonston 2/10 - that was the best one for me as the progesterone really suited me, but I did get a few rough days before periods. I also found that paracetamol with codine dealt with the pain and is available OTC at boots - but be careful with the dosage. I was changed to Femonston conti but it was not strong enough - but I'm just about to ask if I could go back on conti and supplement with gel or similar. I'm not allowed to go back on 2/10 but if I could I would!
Good luck