Name changed as I can't believe I'm even asking such a stupid question. And also didn't know which topic to put this in so thought you symptom-spotters might be able to shed some light.
I have a mirena coil. It's been 5 weeks since my last period (so I'm a couple of days late). This last few days I have had really sore boobs/nipples. They felt really 'full' this morning so when I was in the shower I gave them a bit of a massage and I'm producing breast milk! 
I've done a IC which came back negative so I'm assuming I'm not pregnant.
Is this some kind of side effect from the coil that I've not experienced before? Or is my body going mad? If I was pregnant, surely there'd be enough HCG in my system to give an accurate test result if theres enough to make me start producing milk?
Very confused!