Hello SL...
Aww lovely to see you here too, I hadn't been on here other than the odd lurk for quite a while, and I clocked your name too
Hope you're doing ok... well, other than the Mirena worries.
So the first day I had it done about noon, came straight back to work and it was like very strong period cramps. I took some ibuprofen and had a hot water bottle, and it was better in a few hours. However... I went and panicked myself the next day as I went to use the loo (as in not a wee!) and started myself bleeding. I got crampy again for a few hours and then it stopped. The cramps continued and on the Monday, I started a full proper period (had it put in on the Friday). It petered out after about 3/4 days and then dropped back down to spotting. This went on for about 4/5 weeks so I just used a liner but I never had another full bleed, and the bleeding eventually stopped completely.
I did have to ring my friend a couple of times (she's had Mirenas for years) and she reassured me that it was quite normal and the body's natural reaction to a foreign body (which it technically is). I did wonder the same as you about perforation or whether it has slipped a bit because I was convinced I could feel it poking me (!) but I kind of understood her words because even when I'd had ultrasounds in the past (internal ones), all the poking and prodding around up there was like a trauma to my insides and I did bleed every time afterwards.
I'd say as it's only been a week it is still early days. Also mine was a straightforward Mirena insertion without fibroid issue, but if you're worried at all, particularly if you feel unwell or start running a temperature, get yourself checked out. I would have thought infection would cause abnormal discharge/aroma and pain that doesn't go with regular OTC meds.
I totally understand the worry, if I hadn't had mine done privately I might have gone and got checked at my GP just to check all was in the right place. In the turnout I didn't need to but don't hesitate if it doesn't improve xx