'RHOA' Star NeNe Leakes -- Potentially Fatal Blood Clots NOT Entirely Gone

"Real Housewives of Atlanta" star NeNe Leakes says she's not out of the woods yet ... after doctors found blood clots in her lung.

NeNe was hospitalized last month. after suffering shortness of breath ... and that's when doctors found the clots.

NeNe was looking good at LaGuardia Airport in NYC and she gave us the low down on what could have been a fatal problem.