nobody will think you're lying or exaggerating, don't worry. the medical report will still be able to confirm that you have suffered pain and discomfort in that area since the accident, even if no fracture is seen on the x-ray. I went to the GP about a similar problem a couple of years ago - was given painkillers, told I'd probably either fractured or dislocated my coccyx and told that I could have physio if it didn't imrove in time. He said no point in an x-ray as can't exactly put a cast on it..... don't worry about your claim though - the solicitors and consultants are experts and will be well aware of people being advised, or having the belief that they have suffered a specific injury when the later medical tests show that that's not quite the case. Speak to your solicitor about it tomorow and explain your concerns - if they're worth their salt they'll be able to reassure you xx