V.K.
I got mine from Planned Parenthood and they paid for the entire thing (just requested a donation). Worked well.
I wasn't on the pill right before I got it. I used to be on Depo and personally had less emotional side effects with depo than with Mirena. It's been more than a year since I have had mine inserted and I still have my periods (they said they would eventually go away after about 6 months). They are still painful for me (always have been) and now in addition to all that I feel overly pissy and moody when I am getting close to and on my period. More so than before.
However!!! I do like that I no longer have to worry about going in to get my depo shot or taking a pill everyday (I would forget) and that's a good thing for me. I went back about a month or so ago and asked about the moodiness and pain and they gave me some tips to try. If those tips don't work then I will get it out and go back on depo.
Good Luck!