"My boy of 6 had an accident"

I took my son to a&e at the qeqm on Thursday as we'd thought he'd broke his arm the doctor (who supposedly a bone expert) said no need for x Ray as seems all ok. For the next couple of days my boy was saying he was in pain and couldn't move his arm, so on Saturday took him to deal minor unit to find out he's broke his arm. I'm so frustrated as a quick x Ray would of seen this he's a child and I'm so glad he didn't fall over on Friday.