no conteceptive is a 100% reliable so it could be possible although i think its a small chance. why are you going to wait to do a test? surely the sooner you know the beeter and as you have said you have had 2 strange periods now, therefore you could be a few months gone already. You need to see your gp straight away too if you are as he will need to remove the coil. How do you feel about possibly being pregnant? Obviously you being on the coil you wanted to prevent this, so im sure you head is all over the place now. Have you spoken to your partner about this? Good luck gossipgirl, let us know how you get off xxxx