I got my IUD put in in Sep 2014 and everything was fine for the most part. I would have some slight pain during sex from time to time but nothing major. But recently ,in Dec 2015 I out of no where I got depressed. It kind of felt like someone had sucked all the happiness and joy out of the room. I was just uninterested and I kind of just went through the motions. Then January came and I felt less depressed but started having terrible anxiety and panic attacks with racing thoughts. This went on till March where I would wake up with horrible anxiety feelings in my stomach and actually vomited a few times. These feelings would start to get better by the end of the month when I would have a small spotting period. That was new because I didn't have periods anymore.
I have the same problems as you do. I'm glad to know its not just me. I have had my IUD removed have done the same yet?