Had the Mirena coil fitted 8 days ago, the back pain has got better but has come back with avengeance today! I have been more active than I have since it's been fitted but no more than I have done previously. Does the back pain ever go away? When I had it fitted I described back pain I'd had before with the IUD and she said it sounded like it had moved but the pain isn't as intense/sharp this time, but I also don't have a sedentary job now like before. Will it get better or is it in the wrong place?