Hi Claire_A,
I just got back from the Dr's to have my Mirena checked as I had it put in about 5 weeks ago, I had spotting for the first 10 days, which was annoying but needed nothing more than a panty liner, My Dr said the hormones are localised in the uterus so you should not get the side effects that you get from the pill as they do not go through your blood stream & the amount is so miminal compared to the pill anyhow. I'm only early into it but so far so good, no side effects to report and DTD is no different for DH or myself

To get it put in was uncomfortable but not painful, but my cervix was pretty flexible still as I had DS 8 weeks prior to getting it put in,

Good Luck with your decision, have you got the imformation booklets stating the facts? I got mine from my DR and had really good read before hand.