Etonogestrel
"I've had mine in for almost a year and I will say the first few months were terrible!  I don't have severe anxiety but I did when I  first had it inserted.  I was anxious,  nervous,  irritable,  on edge,  and emotional.  After the first few months passed it got alot better! I've hardly had any periods and the ones I've had were light with no cramps or mood swings.  They're spaced about four months apart and I tend to bleed for longer.  Sometimes up to 3 or even 4 weeks but they're so light I don't notice until I wipe after using the bathroom.  Doesn't interfere with sex either, due to it being so light and not having any period side effects.  I haven't worn a tampon or pad in  almost a year.  My last period I did experience some cramping."