Has anyone developed a thyroid cyst since having mirena placed?...

I had an ultrasound on my throat a few months ago because I had a feeling on a lump in my throat that never went away. They found multiple cysts on my thyroid. I'm have to go for another ultrasound next to see if they've gone down or have gotten larger.

Do you think it was caused from thte mirena? I hate this thing. I am going crazy and I am impatiently waitng for an ultrasound appointment. I just want to find out what this lump is for sure and I guess I am fearing the unknown (cancer).
Thanks so much for your reply.