I know you did, but I think the title is misleading - not everyone reads the conception threads, but this is more a health one. A friend of mine conceived with a coil ( when her twins were 6 mths old!) but I have no idea of the likelihood of this happening so don't feel qualifeid to answer. Thought opening up another thread migth bring in some people who do know.
I've got a funny shaped uterus though which is why I managed it. Generally the failure rate is pretty low. Only risk is that because it was so new that it may have come out/not be in properly? Perhaps a trip to the docs/family planning would be good?