Because according to my GP, my rapid weight gain (10 lbs in 7 weeks - eek), painful breasts, teariness, hair loss and permanent bloated feeling can be nothing whatsoever to do with the fact I've recently had the Mirena put in. Not even if the symptoms have only come on since having it fitted, and are exactly what always happens when I try the pill or any hormonal contraception.
Aaaarrrggggh. I originally went in for the copper coil, and felt a bit arm twisted into trying the Mirena - now I'm stuck feeling rotten until they can (grudgingly) take it out. Why does my GP think she knows my body better than me? It's so frustrating, especially as I asked about side effects before having it done and was told how extremely rare they were!!