My son just got his lead levels tested today. The first time he was tested today it was 8.5 - pretty high - then they told me to wash his hands really well - then retake the test. Apparently if the hands are dirty - they might cause a higher lead reading that normal. His second test was 4.4 - much better. Still not wonderful - but better.
However, I just read an article in the current Parents magazine that notes that any lead level over 3 is potentially concerning. Note that 10 is the current baseline over which lead levels are considered dangerous - but that over the years - the levels have been lowered many times once they discovered ill effects at certain levels of lead. So who's to say they won't lower the baseline once again?
I say trust your instincts - call the doctor back - get a retest, test your home for lead (can be chipping paint - don't forget the windowsills, lead in pipes, or in the soil) - and get lead abatement if need be. In my view - any level of lead isn't safe - so we are taking steps to find and reduce the lead levels in our home.
You may want to also clean any surfaces that may contain dust from lead (like chipped paint) with a wet cloth to pick up the dust (instead of spreading it around).
Go out and get the September 2007 issue of Parents magazine ... it is very helpful regarding lead (p.190). Best of luck to you ...