Possible ovary cyst or moving of mirena

Shea • Mummy to an angel baby💕
Advice please. Anyone else experienced anything like this 
I have the mirena and since getting it I have spotted lightly every month since. But the past 3-4 months I haven't had anything. I know mirena can stop your periods all together. The year I've had it I've been able to feel it and have a lot of discomfort pain. But the past month feeling the mirena has died down and now I'm getting pain on my right side which travels down into my leg. Painful to walk or sit unless I'm in a position where the pain isn't so bad. 
Going to the docs or hospital Monday to ask for a scan to check position of mirena and make sure there's no cyst. Worried about not being able to conceive in future