Over the last few months I have found myself feeling irritable, frustrated, moody and plain PO'd, often over small, insignificant things. I've been taking it out on DH and sometimes get really frustrated with DD, perhaps unnecessarily. I am having trouble articulating the things that are leading me to feel like this, which makes me think I am possibly going nuts.
I am trying to work out if it is some kind of depression, belated PND or perhaps the mirena?
I had the mirena put in 18 months ago, just after DD was born. Physically, I have had no complications or issues with it what so ever, and up until now, have thought it to be the best contraception yet!
But my mood is concerning me. I have not had much luck with the pill in the past - a few have affected my mood (caused depression) significantly, others I have had physical side effects from. Going back on it is really a last resort option for me.
I am interested to know if anyone else has had poor experiences with their mood, while being on the mirena. If so, was it an instant thing from the time of insertion, or was it gradual over time?
I had always put my fatigue, mood and irritability for the first few months post baby, down to slight PND/normal post birth hormones and the natural stressors of life (we've had a few this past 12 months). But now I am wondering if it was the mirena?
I have never had thoughts of self harm or of hurting my husband or daughter. Though I do have moments where I put her down and walk away, to have a breather before going back in to her. And I have been known to yell at her in frustration.

I generally don't feel 'down', just have periods of being angry.
I just want to feel like my normal self again. I'm not sure if taking the mirena out will help more than therapy or not. Another baby for us is not an option right now (or for the next three years minimum), so the anxiety of an accidental pregnancy is a big risk factor to consider....
I would be interested to hear your thoughts and words of wisdom.