Nexplannon - Depression

Emma
I've had the Nexplannon implant a while now, and I'm starting to feel really down.
I have depression like symptoms. I cry ALL the time, I have a really low opinion of myself. I have days where I don't even want to get out of bed or face the world, and I've lost all motivation to do anything. 
It all started shortly after the implant was fitted. My question is - has anyone else been feeling this way, is there a link with Nexplannon and depression?