Copper coil

Kirsty
Hi all, I've recently contacted my Gp about the date i had my copper coil fitted as i completely lost track of the date,only to be told it ran out last year! I'm confused by this as i was under the impression it should last 5-10 years! And I've only had it in since Sept 2011! Does anybody have any advice about whether I'm right in thinking i should have at least another year to go. I have a gp appointment booked for this Friday but any help you could offer before then would be greatly appreciated. Thank you in advance 😊