Mirena (levonorgestrel) inserted 6 months ago. Currently having constant belly aches, nausea, frequent loose stools and cramps.

Sounds GI. Nausea, diarrhea, cramping and belly aches sounds more like a gastrointestinal problem than anything related to an IUD inserted 6 months ago. If this has been going on for more than a few days, you need to check with your primary care provider about what is going on. In the meantime try the BRATT diet ( bananas, rice, applesauce, tea, and toast) and probiotics to help restore normal bacteria.