Welcome to the forum, armorcupcake! I hate that you have to be here, but we are happy to be here for you.
In my opinion....YES YES YES...THAT IS SOOOOOO THE MIRENA. You need to get it out, and you need to get it out now. It's shutting you down just like it did the rest of us. That is the first step to recovery.
Don't get too worried about removal. I had the mirena twice. Both times, the insertion was excruciating, and I didn't feel the removal at all (and it's over in seconds). It's a piece of cake.
Keep us updated on how you are doing...and again, welcome!